This easy meatball sub is always a favorite for both kids and adults. From the juicy meatballs smothered in marinara sauce to the toasted bun and melty cheese on top...it's the perfect sandwich for game day or any day!
In a medium-sized saucepan, add cooked meatballs and 2 cups of marinara sauce. Heat over medium heat for about 5 minutes to warm meatballs and sauce.
While the sauce is warming, prepare the hoagie rolls by preheating the oven to broil.
Gently slice each roll down the middle making sure not to cut all the way through. Brush 1 tbsp softened butter onto each sandwich roll. Feel free to season the bread with garlic salt and/or Italian seasoning if you desire.
Place the hoagie rolls on the baking sheet and into the preheated oven. Be careful to watch the rolls closely. Toasting the rolls on broil should only take 2-3 minutes. They will burn quickly if you don't watch them.
Once the rolls are toasted, remove them from the oven and fill each roll with the warm meatballs/sauce mixture. Each hoagie roll should generously fit 5 meatballs. Add the desired sauce amount to your liking.
Top the meatballs with freshly grated provolone, mozzarella, or cheese of your choice.
Return the hoagies to the oven and broil just until the cheese is melted. This will also be quick, about 1-2 minutes. Serve and enjoy while hot with fresh parsley garnished on top!