A delightful twist on the classic meatball sub, featuring gooey cheese-filled meatballs and a tangy marinara sauce.
Combine the ground beef, breadcrumbs, garlic powder, onion powder, and egg in a mixing bowl until well mixed.
Avoid overmixing the meat mixture to keep the meatballs tender.
Shape the mixture into 12 meatballs and press a cube of mozzarella cheese into the center of each, sealing it inside.
Ensure the cheese is fully enclosed to prevent it from leaking out during cooking.
Place the meatballs on a baking sheet and bake in a preheated oven at 400°F (200°C) for 15 minutes or until cooked through.
Use a meat thermometer to ensure the internal temperature reaches 160°F (71°C).
Heat the marinara sauce in a microwave-safe bowl until warm.
Stir the sauce halfway through heating for even warmth.
Fill each toasted sub roll with three meatballs and spoon marinara sauce over them.
Toast the rolls slightly for added texture and flavor.
Serve the subs immediately and enjoy.
Pair with a fresh salad or chips for a complete meal.