Preheat your oven to 375°F (190°C).

Cook the crumbled bacon in a skillet over medium heat until crispy, about 5–7 minutes.

Sauté chopped onions and mushrooms in the same skillet over medium heat for about 5 minutes until softened.

In a large mixing bowl, combine ground beef, ground pork, breadcrumbs, milk, and Parmesan cheese. Add sautéed veggies and crumbled bacon and mix.

Incorporate eggs, Worcestershire sauce, 1 tablespoon of ketchup, garlic powder, thyme, salt, and pepper. Mix gently until just combined.

Shape the meat mixture into a loaf in a greased baking dish. Spread the remaining ketchup on top.

Bake for 60–70 minutes, checking for an internal temperature of 160°F (71°C).

Let the meatloaf rest for 10 minutes before slicing and serving warm with sides.