Name: Delicious Italian Breakfast Casserole That's Perfect for Brunch
Prep time: 15 min
Cook time: 55 min
Total time: 550 min
Ingredients: 1 tablespoon olive oil (or cooking spray for greasing); 1 lb Italian sausage (uncooked, casings removed); 1 teaspoon Italian seasoning; 1 teaspoon fresh rosemary (finely chopped); 1 small onion (diced); 2 red bell peppers (diced); 2 cups fresh spinach; 2 cloves garlic (minced); 1/2 teaspoon salt; 1/4 teaspoon black pepper; 12 large eggs; 1/2 cup full-fat milk; 1/3 cup ricotta cheese; 1/3 cup Parmesan cheese (finely grated)

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The moment I took a whiff of sizzling Italian sausage mingling with fresh, vibrant veggies, I knew this Overnight Italian Breakfast Casserole was going to be the star of my weekend brunch. This delightful dish is not only a time-saver—prepping it the night before means you can wake up to a delicious, warm breakfast—but it’s also fully customizable to your taste. Whether you stick with classic Italian flavors or throw in your favorite seasonal veggies, you’re bound to impress family and friends. Perfect for lazy Sundays or special gatherings, this casserole blends savory goodness with creamy cheeses and can be served any time, hot or cold. Curious about how easy it is to whip up? Let’s dive into the recipe!

Why is this Italian Breakfast Casserole special?

Ease of preparation: Simply prepare it the night before, allowing you to enjoy a stress-free morning.
Flavor explosion: Infused with savory Italian sausage and fresh veggies, each bite offers an incredible taste experience.
Versatile options: Customize with your favorite ingredients, making it ideal for any gathering—like a vibrant Italian Pasta Salad as a side!
Crowd-pleaser: Perfect for feeding a group, so it’s excellent for holidays or brunch parties.
Healthy twist: Packed with nutrients from fresh vegetables, this casserole ensures a fulfilling start to your day!

Italian Breakfast Casserole Ingredients

For the Casserole
• Olive Oil or Cooking Spray – Essential for greasing the pan to prevent sticking; a neutral oil works too.
• Italian Sausage (1 lb, uncooked, casings removed) – Provides a rich, savory base for flavor; can be swapped for turkey sausage or a plant-based option.
• Italian Seasoning (1 tsp) – Enhances the herbal flavor profile; use fresh herbs for a more aromatic taste if desired.
• Fresh Rosemary (1 tsp, finely chopped) – Adds aromatic depth; thyme or oregano makes a perfect substitute.
• Onion (1 small, diced) – Adds sweetness and depth; red or yellow onions work well; shallots can also substitute for a milder flavor.
• Red Bell Peppers (2, diced) – Contribute sweetness and color; feel free to use green or other colored bell peppers.
• Fresh Spinach (2 cups) – Provides a fresh, green element and nutrition; kale or other leafy greens can be substituted.
• Garlic (2 cloves, minced) – Enhances flavor with a fragrant kick; can be omitted for a milder dish.
• Salt (1/2 tsp) & Black Pepper (1/4 tsp) – Basic seasoning for balance; adjust according to taste preferences.
• Large Eggs (1 dozen) – The primary binder that gives structure; for an egg substitute, use silken tofu or egg replacer.
• Full-Fat Milk (1/2 cup) – Adds creaminess; almond milk or any dairy alternative works for a lighter version.
• Ricotta Cheese (1/3 cup) – Provides creaminess and flavor; cottage cheese is a lower-fat alternative.
• Parmesan Cheese (1/3 cup, finely grated) – Adds savory depth; can be substituted with Pecorino Romano or nutritional yeast.

Step‑by‑Step Instructions for Overnight Italian Breakfast Casserole

Step 1: Grease the Casserole Dish
Start by greasing a 9×13 casserole dish with olive oil or cooking spray to ensure your Italian Breakfast Casserole doesn’t stick. Make sure to cover the entire bottom and sides evenly. This step is crucial to enjoy every delicious bite without any hassle. Set the greased dish aside while you prepare the filling.

Step 2: Cook the Sausage
In a large skillet over medium heat, add the uncooked Italian sausage, breaking it apart with a spatula. Cook until browned and fully cooked through—about 8 to 10 minutes. As it cooks, sprinkle in the Italian seasoning and chopped rosemary to infuse the sausage with flavor. Once done, remove the skillet from heat and set aside the sausage mixture.

Step 3: Sauté the Vegetables
In the same skillet, add a drizzle of olive oil if needed, then sauté the diced onion and red bell peppers over medium heat. Cook for about 6 minutes or until the vegetables are softened and fragrant. Next, stir in the fresh spinach, minced garlic, salt, and pepper, cooking for an additional 2 minutes until the spinach has wilted. This vibrant veggie mix will perfectly complement your casserole.

Step 4: Combine the Sausage and Vegetables
Carefully combine the cooked Italian sausage with the sautéed vegetables in the skillet. Stir well to mix all the delicious ingredients together, allowing them to cool for a few minutes. This combination forms the savory base for your Overnight Italian Breakfast Casserole, bringing out the traditional flavors of Italy in every bite.

Step 5: Prepare the Egg Mixture
In a large mixing bowl, whisk together one dozen large eggs, ½ cup of full-fat milk, ⅓ cup of ricotta cheese, and ⅓ cup of grated Parmesan cheese until smooth and well combined. This creamy egg mixture will bind all the components together and create a luscious texture. Make sure there are no lumps for the best consistency in your Italian Breakfast Casserole.

Step 6: Layer the Casserole
Now it’s time to start layering! First, place half of the sausage and veggie mixture in the greased casserole dish, spreading it out evenly. Next, pour half of the egg mixture over the fillings, ensuring it’s evenly distributed. Repeat with the remaining sausage and veggies, followed by the rest of the egg mixture. Gently shake the pan to combine the layers slightly and create a cohesive casserole.

Step 7: Refrigerate or Bake Immediately
Cover the casserole dish with plastic wrap and refrigerate overnight to allow the flavors to meld beautifully, or if you’re short on time, you can bake it immediately. If refrigerated, this step ensures that your Overnight Italian Breakfast Casserole is flavorful and aromatic, making your morning effortless.

Step 8: Bake the Casserole
When you’re ready to enjoy, preheat your oven to 350°F (175°C). Bake the casserole uncovered for about 55 minutes or until the center is set and the top is golden brown. Keep an eye on it during the last few minutes of baking for that perfect golden crust, which is the hallmark of a delicious Italian Breakfast Casserole.

Step 9: Cool and Serve
Once baked, remove the casserole from the oven and let it cool for about 10 minutes. This cooling period allows for easier slicing. Use a sharp knife to cut into squares, and serve warm. Enjoy this delectable Overnight Italian Breakfast Casserole with family and friends for a delightful meal anytime!

Italian Breakfast Casserole Variations

Feel free to get creative with your Overnight Italian Breakfast Casserole and tailor it to your taste buds!

Spicy Chorizo: Swap the Italian sausage for chorizo to bring a delightful kick! The heat of the chorizo pairs beautifully with the creamy cheese and gives it a fun twist.
Mushroom Medley: Add sautéed mushrooms to the veggie mix for an earthy flavor that enhances the overall dish. They soak up the creamy egg mixture nicely.
Veggie Lovers: Load up on even more fresh vegetables by adding zucchini and chopped kale. They’ll add vibrant color and extra nutrition to the casserole.
Herb Blast: Incorporate fresh basil and parsley for a fragrant touch that brightens up each bite. Just sprinkle them on top before serving to elevate the dish!
Cheesy Goodness: Enhance the richness by adding a blend of cheeses like mozzarella or provolone along with the ricotta and Parmesan. This will create deliciously gooey layers.
Meat-Free Marvel: To make it fully vegetarian, skip the sausage altogether and double up on the vegetables. A little nutritional yeast can add a cheesy flavor without the dairy!
Breakfast Burrito Style: Consider adding a bit of cooked, cubed potatoes or even a dash of salsa into the mix. Serve with warm tortillas for a fun breakfast burrito option!
Smoky Paprika: Give it a smoky twist by sprinkling in some smoked paprika along with the Italian seasoning. This subtle change can bring out unexpected, delicious flavors.

With these variations, your Italian Breakfast Casserole can be a new experience each time! Pair it with a light salad or buttery biscuits for a hearty brunch—just like the delightful spread found at gatherings where this dish shines in the spotlight. Don’t forget to check out some of my other favorites like the delicious Ham and Cheese Breakfast Casserole or a vibrant Skillet Breakfast Hash. Enjoy your culinary adventures!

Storage Tips for Italian Breakfast Casserole

Fridge: Store leftovers in an airtight container in the refrigerator for up to 5 days. This keeps your flavorful Italian breakfast casserole fresh and ready to enjoy again.

Freezer: If you want to save it for later, freeze the casserole wrapped tightly in plastic wrap and aluminum foil for up to 3 months. Thaw overnight in the fridge before reheating.

Reheating: Reheat in the microwave or oven until warmed through, about 20 minutes at 350°F (175°C). This makes for a quick and satisfying meal any day of the week!

What to Serve with Overnight Italian Breakfast Casserole

Imagine a lovely brunch table brimming with colorful dishes that perfectly complement the savory richness of your casserole.

Fresh Fruit Salad: A vibrant mix of seasonal berries and melons adds a refreshing sweetness, balancing the casserole’s hearty flavors beautifully.
Garlic Toast: Crisp, buttery garlic bread provides a satisfying crunch, perfect for scooping up every delicious morsel of casserole.
Simple Arugula Salad: A light and peppery arugula salad drizzled with olive oil and lemon brightens the palate, contrasting wonderfully with the rich, cheesy casserole.
Potato Wedges: Crispy, seasoned potato wedges offer a delightful texture, perfect for dipping into the creamy layers of your Italian breakfast creation.
Espresso or Italian Roast Coffee: A robust cup of coffee enhances the meal, giving it an authentic Italian feel while awakening your senses.
Mini Cinnamon Rolls: Serve warm, gooey cinnamon rolls on the side for a sweet touch that pairs harmoniously with your savory dish.
Sparkling Water with Lemon: Light and fizzy, this refreshing drink cleanses the palate, making each bite of casserole stand out.
Chocolate Chip Pancakes: A delightful treat for those with a sweet tooth, these fluffy pancakes can round out your brunch experience perfectly.

Expert Tips for Italian Breakfast Casserole

Even Cooking: Ensure all ingredients are evenly distributed while layering. This helps the Italian breakfast casserole cook uniformly and ensures every bite is flavorful.
Use Fresh Ingredients: Fresh vegetables and herbs amplify the dish’s flavor, creating a tastier casserole. Avoid wilted or old produce for the best results.
Bake with Care: Avoid opening the oven frequently while baking. This maintains temperature and helps create a perfect golden crust.
Customizable Flavors: Feel free to experiment with different vegetables or sausage types! This adaptability allows your Italian breakfast casserole to cater to diverse tastes.
Fresh Herbs Finish: For a burst of freshness, garnish your casserole with freshly chopped herbs like basil or parsley just before serving.

Make Ahead Options

These Overnight Italian Breakfast Casserole preparations are perfect for busy cooks looking to save time! You can fully assemble the casserole up to 24 hours in advance, allowing the flavors to meld beautifully overnight in the refrigerator. Just follow all the steps from greasing the dish to layering the ingredients, cover it tightly with plastic wrap, and refrigerate. To maintain quality, ensure the casserole is well-sealed to prevent drying out. When ready to serve, simply preheat the oven to 350°F (175°C) and bake it for about 55 minutes until golden and set. You’ll enjoy a delicious homemade breakfast with minimal effort in the morning!

Italian Breakfast Casserole Recipe FAQs

How do I choose the right ingredients?
When selecting your Italian sausage, look for fresh, high-quality options free of preservatives. Ideally, the packaging should be labeled “natural.” For the vegetables, choose vibrant, firm ones without dark spots or wilting—especially for the spinach and bell peppers, as this ensures the best flavor and texture in your casserole.

How can I store leftovers?
Leftovers can be stored in an airtight container in the refrigerator for up to 5 days. I often make a double batch on the weekend, enjoying homey breakfasts throughout the week. If you want to enjoy your casserole later, feel free to freeze it—just wrap it tightly in plastic wrap and aluminum foil for up to 3 months!

What’s the best way to freeze my casserole?
To freeze your Italian Breakfast Casserole, ensure it’s completely cooled. Cover it tightly with plastic wrap, then with a layer of aluminum foil for added protection. When you’re ready to enjoy it, thaw it overnight in the fridge. Reheat in the oven at 350°F (175°C) for about 20-25 minutes until heated through, bringing that fresh-baked aroma back to life.

What should I do if the casserole turns out too soggy?
If your casserole ends up a bit soggy, there are a couple of steps to fix it! First, ensure you aren’t using too much liquid in your egg mixture. Also, baking it uncovered for an extra 10-15 minutes can help firm it up. Lastly, consider letting the casserole sit for a few minutes after baking—it helps the bits settle down and makes slicing much easier!

Are there any dietary considerations I should be aware of?
Absolutely! If you’re preparing this casserole for guests with dietary restrictions, consider using gluten-free bread or a plant-based sausage for those avoiding meat. This dish is naturally high in protein from eggs and cheese, but always check for dairy allergies if needed. For pet safety, never share any leftovers containing onion or garlic with your furry friends, as these can be harmful to them.