1. Preheat oven to 375° F.
2. Cut bread pieces into 4 slices each to make 16 slices.
3. Place bread slices in a single layer on bottom and around edge of casserole dish.
4. Prepare meatballs according to package directions and warm spaghetti sauce.
5. Layer meatballs and spaghetti sauce in center of casserole dish.
6. Sprinkle with cheese. Bake for 12-15 minutes or until cheese melts.