Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

Sauté chopped onion and minced garlic in a skillet over medium heat for 5-7 minutes until translucent.

In a bowl, combine ground beef, breadcrumbs, Parmesan, parsley, basil, onion, garlic, eggs, marinara sauce, Italian seasoning, salt, and pepper.

Shape the meat mixture into a rectangle about 1 inch thick on parchment.

Sprinkle mozzarella cheese over the meat rectangle and add optional pepperoni or prosciutto.

Carefully roll the meat mixture using the parchment as a guide into a log shape.

Place the rolled meatloaf seam side down on the baking sheet and top with marinara sauce.

Bake in the oven for about 60 minutes, or until the internal temperature reaches 160°F (70°C).

Let the meatloaf rest for 15-20 minutes before slicing.

Serve warm, drizzling with more marinara sauce if desired.