Cut dough sheet into 4 squares; place about 1/4 cup spaghetti and 1 meatball in the middle of each square. Top each with 1 tablespoon of the cheese. To make each roll, fold 1 corner diagonally across to other side. Pull opposite corner over diagonally. Tuck in loose dough, and pull remaining 2 corners over the top and place one over the other.