Step 1

Preheat your oven to 350°F (175°C). Line a baking sheet or loaf pan with parchment paper or lightly grease it.

Step 2

In a large bowl, combine ground beef, ground pork if using, breadcrumbs, egg, milk, chopped onion, minced garlic, Worcestershire sauce, salt, pepper, and dried herbs. Mix gently until well combined.

Step 3

Form the mixture into a loaf and place on the prepared baking sheet or in the loaf pan. Bake in the preheated oven for 45-50 minutes, or until the internal temperature reaches 160°F (71°C).

Step 4

While the meatloaf bakes, heat olive oil in a pan over medium heat. Sauté the mushrooms until golden, about 5-6 minutes. Add butter and additional Worcestershire sauce, cooking for 2 more minutes.

Step 5

After baking, top the meatloaf with Swiss cheese slices and the sautéed mushrooms. Return to the oven for 5-7 minutes or until the cheese melts.

Step 6

Remove the meatloaf from the oven, let it rest a few minutes, garnish with chopped parsley, and serve hot.