These Meatball Subs are the ultimate comfort food sandwich — juicy homemade meatballs piled into toasted hoagie rolls, and topped with melty cheese. Perfect for game day or a cozy weeknight dinner!
Preheat the oven to 400℉. Line a large, rimmed baking sheet with foil and spray the foil with nonstick spray.
In a large bowl, use clean hands to combine the meatball ingredients. Be careful not to over mix. Roll the mixture into meatballs (try to get 16 meatballs), and arrange them on the prepared baking sheet.
Bake until the meatballs are fully cooked, 15 to 20 minutes.
MAKE THE SUBS:
Preheat the broiler. Line a large rimmed baking sheet with foil. Lay the split hoagie rolls out on the tray (open faced).
Spread a tablespoon or so of marinara sauce onto each side of each hoagie roll. Place 4 meatballs in each roll, and top the meatballs on each hoagie with 1 to 2 tablespoons of marinara. Sprinkle the mozzarella on top of the meatballs, and then top with the Parmesan.
Broil until the cheese is melted. Remove from the oven, and sprinkle on fresh parsley (if using).