1. Heat the sauce and meatballs in a 3-qt. saucepan over medium-high heat to a boil. Reduce the heat to low. Cook for 20 min. or until the meatballs are heated through, stirring occasionally.
2. Spoon the meatballs and sauce into the rolls. Top with the mozzarella and Parmesan cheeses.
Cost per recipe: $9.94