Preheat Oven: Set your oven to 375°F (190°C) and grease a baking dish or line it with parchment paper.
Mix Ingredients: In a large bowl, combine ground beef, ground pork, breadcrumbs, milk, Parmesan cheese, onions, mushrooms, bacon, and Swiss cheese.
Season and Bind: Add eggs, Worcestershire sauce, 1 tablespoon of ketchup, garlic powder, thyme, salt, and black pepper. Mix gently until well incorporated.
Shape the Loaf: Transfer the mixture to the prepared baking dish and shape it into a loaf. Smooth the top evenly.
Add the Glaze: Spread the 1/2 cup of ketchup over the top of the meatloaf for a rich, caramelized finish.
Bake: Place the meatloaf in the oven and bake for 50-60 minutes or until the internal temperature reaches 160°F (71°C).
Rest and Serve: Let the meatloaf rest for 10 minutes before slicing. This ensures it remains juicy and easy to cut.