01 -
In a large bowl, mix the ground beef, Italian breadcrumbs, Parmesan Cheese, egg, oregano, basil, onion powder, garlic powder, salt, and pepper. Roll the mixture into 1-inch meatballs.
02 -
In a large skillet over medium heat, brown the meatballs on all sides. Drain any excess grease. Add the marinara sauce to the skillet with the meatballs and simmer over medium-low heat for 15 minutes.
03 -
While the meatballs are simmering, split, butter, and toast the sub rolls under the broiler.
04 -
Spread half of the cheese over the bottom of the rolls. Place 5 meatballs in each roll and top with the remainder of the cheese. Broil the sandwiches just until the cheese is melted and lightly browned.
05 -
If desired, sprinkle with Parmesan cheese and chopped parsley. Serve promptly.