Take your meatball sub to the next level with this mozzarella-stuffed version. The meatballs are made with a mixture of ground beef, breadcrumbs, grated Parmesan cheese, minced garlic, chopped parsley, salt, pepper, and an egg. To add a cheesy surprise, stuff each meatball with a cube of mozzarella cheese before cooking. Brown the meatballs in a skillet and then simmer them in marinara sauce until cooked through. To assemble the sub, slice a baguette lengthwise and spread some marinara sauce on both sides. Place the mozzarella-stuffed meatballs on one side of the baguette and top with more marinara sauce. Sprinkle shredded mozzarella cheese on top and toast the sub in the oven until the cheese is melted and gooey. Serve hot and enjoy the ooey-gooey goodness of this mozzarella-stuffed meatball sub!
