Meatball subs are best when homemade ... This sandwich traditionally consists of beef meatballs, marinara sauce, mozzarella or provolone cheese and crusty bread like a hoagie roll or baguette.
Evenly divide the meatballs between the rolls and top with the marinara sauce and mozzarella. Bake the subs until the sauce is hot and the mozzarella is melted, 8 to 10 minutes. Sprinkle with ...