Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine the ground beef, French onion soup, breadcrumbs, egg, garlic powder, onion powder, Worcestershire sauce, salt, and black pepper. Mix until just combined; avoid overmixing.
Shape the mixture into a loaf and place it in a greased 9x5-inch loaf pan.
Bake in the preheated oven for 1 hour.
After 1 hour, remove the meatloaf from the oven and sprinkle the shredded mozzarella cheese on top. Return to the oven and bake for an additional 10-15 minutes, or until the cheese is melted and bubbly.
Once done, let the meatloaf rest for 10 minutes before slicing. Garnish with chopped parsley if desired.