Preheat your oven to 375°F (190°C). Lightly grease a loaf pan or line a baking sheet with foil.

In a skillet, cook bacon until crispy, about 6-8 minutes. Set aside and sauté mushrooms in the bacon fat until browned, about 4-5 minutes.

In a large bowl, combine ground beef, eggs, breadcrumbs, onions, garlic, Worcestershire sauce, salt, and pepper. Mix gently until just combined.

Transfer the meat mixture to the prepared pan and shape it into a loaf. Press bacon and sautéed mushrooms into an indentation on top, then add shredded Swiss cheese.

Bake for 45-55 minutes until the internal temperature reaches 160°F (71°C).

Let it rest for about 10 minutes before slicing, and garnish with fresh parsley.