- In a large saucepan, mix pizza sauce, apple jelly, Italian seasoning, salt and pepper. Bring to a low boil over medium heat.
- Place frozen meatballs into the sauce mixture. Cover and simmer over medium heat for 20 minutes, or until meatballs are heated through, stirring occasionally.
- While the meatballs are cooking, preheat oven to 375°F. Place the split hoagie rolls on a large baking sheet.
- Place several meatballs and desired amount of sauce in each roll. Layer with mozzarella cheese. Place in the preheated over for 2 to 3 minutes, or until cheese is melted.