Jump to Recipe Print RecipeAs I cracked the eggs for breakfast this morning, a wave of nostalgia washed over me—reminders of family brunches flooded my mind, all centered around one dish: the Easy Breakfast Casserole. This comforting recipe effortlessly brings together earthy mushrooms, vibrant peppers, and nutritious spinach, topped with fluffy eggs and melty cheese. Designed for make-ahead convenience, it’s your go-to solution for hassle-free mornings, allowing you to savor those extra moments with loved ones. Plus, it’s not just a breakfast staple; it’s hearty enough to shine at dinner too! Ready to elevate your brunch game with a dish that’s deliciously satisfying and beautifully simple? Let’s dive into this make-ahead marvel that’s bound to become a new favorite on your table. Why is this Casserole a Game-Changer? Easy Preparation: You can prepare this casserole the night before, making mornings a breeze! Deliciously Versatile: It’s perfect for both brunch and dinner, adapting to any occasion. Nutrient-Rich: Packed with veggies, it provides a hearty and wholesome meal that family members of all ages will enjoy. Time-Saving Wonder: With minimal prep and quick baking, you’ll spend more time with loved ones and less time in the kitchen! Crowd-Pleaser: This dish not only fills stomachs but brings smiles, making it ideal for gatherings. Don’t forget to check out similar comforting recipes like the Skillet Breakfast Hash and Cheesy Broccoli Casserole that also cater to both taste and convenience! Easy Breakfast Casserole Ingredients • Gather everything you’ll need to create this delightful Easy Breakfast Casserole! For the Casserole Thick-Cut Bacon – Adds savory richness; substitute with turkey bacon or sausage for a lighter option. Cremini Mushrooms – Provides earthy flavor; can be swapped with button mushrooms or omitted entirely. Olive Oil – Used to sauté vegetables; omit if there’s enough bacon fat remaining. Yellow Onion – Adds sweetness and depth; any onion variety works well in this recipe. Kosher Salt and Black Pepper – Essential for seasoning; adjust to taste as needed. Bell Peppers – Contributes sweetness and color; feel free to use any color or substitute with zucchini. Garlic – Enhances aroma; fresh garlic is best, but feel free to adjust based on your flavor preference. Fresh Baby Spinach – Adds nutrition and vibrancy; kale or another leafy green can be used as a substitute. Frozen Shredded Potatoes – Provides structure and heartiness; fresh potatoes can be used if par-cooked and shredded beforehand. Shredded Cheddar Cheese – Offers creaminess; other cheeses like Monterey Jack or mozzarella can be substituted. Large Eggs – Binds the casserole; egg substitutes may not effectively work in this dish. Milk or Half-and-Half – Adds creaminess; choose plant-based milk for a dairy-free option. Garnish (Chopped Dill or Chives) – Optional but elevates flavor and presentation beautifully. With these ingredients at hand, you’re on your way to creating a memorable Easy Breakfast Casserole that will surely impress family and friends! Step‑by‑Step Instructions for Easy Breakfast Casserole Step 1: Preheat the Oven and Prepare Baking Dish Begin by preheating your oven to 375°F (190°C). While the oven is warming up, take a 9×13-inch baking dish and generously grease it with cooking spray or butter. This ensures your Easy Breakfast Casserole releases easily after baking, making for a beautiful presentation. Step 2: Cook the Bacon In a large skillet, cook 6 slices of thick-cut bacon over medium heat until crispy, about 8 to 10 minutes. Once done, use tongs to transfer the bacon to a paper towel-lined plate to drain excess grease, while reserving the bacon fat in the skillet for added flavor in the dish. Step 3: Sauté the Vegetables In the same skillet with the reserved bacon fat, add 8 ounces of cremini mushrooms and sauté for about 4 minutes until they begin to soften. Next, mix in one chopped yellow onion and a pinch of kosher salt; continue cooking until the onions become translucent, usually about 3 to 5 minutes, releasing their sweet aroma. Step 4: Add More Flavor Once the mushrooms and onions are ready, add in 1 cup of diced bell peppers and 2 cloves of minced garlic. Stir the mixture well, cooking for an additional minute until the garlic is fragrant, then gently stir in 4 ounces of fresh baby spinach, cooking just until it wilts. This veggie medley forms the flavorful base of your Easy Breakfast Casserole. Step 5: Combine Potatoes and Veggies In a large bowl, mix the sautéed vegetable mixture with 2 cups of frozen shredded potatoes. Ensure the veggies are evenly distributed throughout the potatoes, then transfer this hearty mixture into the prepared baking dish, spreading it out evenly for consistent baking. Step 6: Layer with Bacon and Cheese Crumble the cooked bacon over the veggie and potato layer in the baking dish. Then, sprinkle with 1 cup of shredded cheddar cheese, creating a delicious, cheesy foundation that will melt beautifully during baking, enhancing the flavors of the Easy Breakfast Casserole. Step 7: Whisk Eggs and Milk In a separate large bowl, whisk together 6 large eggs, 1 cup of milk or half-and-half, and a pinch of salt and black pepper. This egg mixture binds all the layers together. Once combined, pour it evenly over the vegetable, bacon, and cheese layers in the baking dish, ensuring it seeps through the mixture. Step 8: Add Final Cheese and Bake Top the casserole with an additional cup of shredded cheese for an extra cheesy finish. Place the baking dish in the preheated oven and bake for 45 to 55 minutes, until the casserole is golden brown, puffed up, and a knife inserted in the center comes out clean, signaling it’s fully cooked through. Step 9: Let it Rest and Serve Once done baking, remove the Easy Breakfast Casserole from the oven and let it sit for 5 to 10 minutes. This resting period allows it to set, making for easier slicing. If desired, garnish with chopped dill or chives before cutting into squares and serving warm, ready for a fulfilling meal. Expert Tips for Easy Breakfast Casserole Advance Preparation: Prepare the casserole one day ahead for maximum flavor and convenience, but don’t exceed 24 hours in the fridge. Resting Time: Allow the casserole to sit for 5-10 minutes after baking. This helps it set, ensuring cleaner slices when serving. Mix Well: Make sure to thoroughly combine the shredded potatoes with the sautéed vegetables. This evenly distributes flavors and avoids dry spots in your Easy Breakfast Casserole. Bacon Alternatives: If you prefer a lighter option, turkey bacon or lean sausage makes fantastic substitutes without sacrificing flavor. Vegetable Variations: Feel free to get creative! Experiment with seasonal vegetables or add some spices like smoked paprika for an extra kick. What to Serve with Easy Breakfast Casserole Gather your loved ones and let the aroma of a hearty, satisfying meal fill the air as you explore these delightful pairings. Fresh Green Salad: A crisp salad adds a refreshing contrast to the warmth of the casserole, making each bite feel balanced and revitalizing. Avocado Slices: Creamy avocado enhances the flavors beautifully while providing a touch of healthy fats, complementing the dish’s savory notes. Fruit Salad: A medley of seasonal fruits brings a burst of sweetness, cutting through the richness of the casserole and offering a light finish. Yogurt Parfaits: Layer vanilla yogurt with granola and berries for a creamy and crunchy side that feels indulgent yet wholesome. Coffee or Tea: A warm cup of your favorite brew enhances the comforting morning vibes, setting the perfect tone for a leisurely brunch. Juice or Smoothies: Brighten the table with citrus juices or blended fruit smoothies for a refreshing and vibrant accompaniment. Muffins or Pastries: Light, fluffy muffins or buttery pastries add a delightful sweetness to your spread, tempting everyone with their aroma. Simple Herb Garnish: A sprinkle of fresh parsley or dill over the casserole before serving brightens the dish visually and enhances its flavor profile. With these appealing additions, your Easy Breakfast Casserole will shine at any meal and leave the table buzzing with contentment! Make Ahead Options These Easy Breakfast Casserole preparations are perfect for busy home cooks looking to save time! You can assemble the casserole up to 24 hours in advance, simply cover it tightly and refrigerate. This allows the flavors to meld beautifully, enhancing the overall taste. When you’re ready to bake, preheat the oven and just pop the casserole in, adding an extra 5-10 minutes to the baking time since it will be cold from the fridge. For optimal quality, ensure everything is well mixed before pouring the egg mixture over it to avoid any dry spots. Trust me, your family will adore this make-ahead option that brings convenience and comfort to your table! Easy Breakfast Casserole Variations Feel free to adapt this Easy Breakfast Casserole to suit your tastes and dietary needs, creating a personalized masterpiece! Sausage or Ham: Swap bacon for cooked sausage or diced ham for a different savory kick. This change adds a delightful layer of flavor that complements the veggies beautifully. Dairy-Free Delight: Use plant-based milk and dairy-free cheese to create a lovely, lactose-free version that everyone can enjoy. This makes it accessible for friends or family with dietary restrictions. Feta or Goat Cheese: Replace cheddar with feta or goat cheese for a tangy twist that contrasts beautifully with the heartiness of the casserole. It elevates the dish while providing a creamy texture! Spicy Kick: Add diced jalapeños or a dash of cayenne pepper to the egg mixture if you enjoy a bit of heat. The spice adds excitement, turning your casserole into a delectable sensation. Zucchini Swap: Substitute bell peppers with zucchini for a different flavor profile or to use up seasonal vegetables. It adds a subtle sweetness while keeping the casserole vibrant. Sweet Potato Substitution: For a heartier base, swap frozen shredded potatoes with shredded sweet potatoes. They bring a naturally sweet taste that pairs wonderfully with the savory elements of the casserole! Herb Infusion: Enhance the flavor by mixing in fresh herbs like thyme or basil into the veggie mixture. This adds a refreshing, aromatic touch that elevates your dish to the next level. Greens Galore: Incorporate cooked kale or Swiss chard in place of spinach for an extra nutrient boost. This variation not only varies the flavor but also enhances the dish’s visual appeal with vibrant green colors. Don’t forget to check out the comforting Loaded Broccoli Casserole for another delightful recipe that you can customize and enjoy! Storage Tips for Easy Breakfast Casserole Fridge: Store any leftover Easy Breakfast Casserole in an airtight container for up to 3 days. Reheat in the microwave for a quick and cozy meal. Freezer: If you want to keep it longer, freeze individual portions in freezer-safe containers for up to 2 months. When ready to eat, simply thaw overnight in the fridge before reheating. Reheating: For best results, reheat in the oven at 350°F (175°C) for about 20-25 minutes, covering with foil to prevent drying out. Room Temperature: Avoid leaving the casserole at room temperature for longer than 2 hours to ensure safety and freshness. Easy Breakfast Casserole Recipe FAQs How do I select ripe vegetables for this casserole? Absolutely! When choosing vegetables, look for vibrant colors and firmness. For instance, bell peppers should be bright and crisp, while spinach should be fresh and free of wilting. Avoid any with dark spots or signs of spoilage to guarantee the best flavor in your Easy Breakfast Casserole. How should I store leftovers of my Easy Breakfast Casserole? For storage, place any leftovers in an airtight container and keep them in the fridge for up to 3 days. I often find it easiest to reheat slices in the microwave. If you’d like to keep it for a longer period, go ahead and freeze individual portions for up to 2 months. Just ensure they’re in freezer-safe containers! Can I freeze the Easy Breakfast Casserole? If so, how? Definitely! To freeze, let your casserole cool completely after baking. Then, cut it into individual pieces and wrap each slice tightly in plastic wrap or store in a freezer-safe container. It’s best enjoyed within 2 months. When ready to eat, simply thaw overnight in the fridge, then reheat in the oven at 350°F for about 20-25 minutes. This technique helps maintain its delicious texture. What common issues should I be aware of when making the casserole? Very good question! One common issue is undercooking the potatoes if they’re fresh; make sure to par-cook them before shredding! Additionally, if the casserole is watery, it may be due to extra moisture from the veggies. I recommend sautéing them well to reduce moisture content before mixing. Lastly, always let it rest after baking to help it firm up, making for cleaner slices. Are there any dietary considerations for pets or allergies? Absolutely! If you have pets, be aware that some ingredients like onions and garlic can be harmful to them. If you’re cooking for someone with allergies, consider swapping out or omitting specific items like cheese or using gluten-free potatoes to accommodate dietary restrictions. Enjoy accommodating everyone at your table! Can I use different vegetables or proteins in the recipe? Very much! The Easy Breakfast Casserole is incredibly adaptable. Feel free to substitute cremini mushrooms with button mushrooms or add zucchini for extra nutrients. You can also switch out the bacon for your favorite sausage or even omit meat entirely for a vegetarian version. The more, the merrier! Savory Easy Breakfast Casserole for Stress-Free Mornings Delicious and comforting Easy Breakfast Casserole combining savory ingredients, perfect for stress-free mornings with family. Print Recipe Pin Recipe Prep Time 20 minutes minsCook Time 55 minutes minsResting Time 10 minutes minsTotal Time 1 hour hr 25 minutes mins Servings: 8 slicesCourse: BreakfastCuisine: AmericanCalories: 300 Ingredients Equipment Method Nutrition Notes Ingredients 1x2x3x? For the Casserole6 slices Thick-Cut Bacon Adds savory richness; substitute with turkey bacon or sausage for a lighter option.8 ounces Cremini Mushrooms Provides earthy flavor; can be swapped with button mushrooms or omitted entirely.1 tablespoon Olive Oil Used to sauté vegetables; omit if there's enough bacon fat remaining.1 medium Yellow Onion Adds sweetness and depth; any onion variety works well in this recipe.1 teaspoon Kosher Salt Essential for seasoning; adjust to taste as needed.1 teaspoon Black Pepper Essential for seasoning; adjust to taste as needed.1 cup Bell Peppers Contributes sweetness and color; feel free to use any color or substitute with zucchini.2 cloves Garlic Enhances aroma; fresh garlic is best.4 ounces Fresh Baby Spinach Adds nutrition and vibrancy; kale or another leafy green can be used as a substitute.2 cups Frozen Shredded Potatoes Provides structure and heartiness; fresh potatoes can be used if par-cooked and shredded beforehand.1 cup Shredded Cheddar Cheese Offers creaminess; other cheeses like Monterey Jack or mozzarella can be substituted.6 large Eggs Binds the casserole; egg substitutes may not effectively work in this dish.1 cup Milk or Half-and-Half Adds creaminess; choose plant-based milk for a dairy-free option.1/4 cup Garnish (Chopped Dill or Chives) Optional but elevates flavor and presentation beautifully. Equipment 9x13-inch baking dishLarge SkilletLarge mixing bowl Method Step-by-Step Instructions for Easy Breakfast CasserolePreheat your oven to 375°F (190°C) and grease a 9x13-inch baking dish with cooking spray or butter.Cook the bacon in a large skillet over medium heat until crispy, about 8 to 10 minutes, then transfer to a paper towel-lined plate and reserve bacon fat.In the same skillet, add cremini mushrooms and sauté for about 4 minutes. Add chopped yellow onion and a pinch of kosher salt; cook until translucent, about 3 to 5 minutes.Add diced bell peppers and minced garlic, stir well, and cook for an additional minute. Stir in fresh baby spinach and cook until wilted.In a large bowl, mix the sautéed vegetables with frozen shredded potatoes, then transfer to the greased baking dish.Crumble the cooked bacon over the mixture, then sprinkle with shredded cheddar cheese.Whisk together eggs, milk or half-and-half, and a pinch of salt and black pepper; pour evenly over the casserole layers.Top with an additional cup of shredded cheese, then bake in the oven for 45 to 55 minutes until golden brown.Allow to rest for 5 to 10 minutes before serving. Garnish with chopped dill or chives if desired. Nutrition Serving: 1sliceCalories: 300kcalCarbohydrates: 20gProtein: 15gFat: 20gSaturated Fat: 9gPolyunsaturated Fat: 2gMonounsaturated Fat: 7gCholesterol: 200mgSodium: 600mgPotassium: 300mgFiber: 2gSugar: 2gVitamin A: 500IUVitamin C: 30mgCalcium: 150mgIron: 2mg NotesPrepare the casserole one day ahead for maximum flavor and convenience. Allow it to sit for 5-10 minutes after baking for easier slicing. 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