1. Preheat oven to 400°F.
2. Combine meatballs, Alfredo sauce and pesto together. Toss to coat.
3. Top each bottom half of loaf with 3 meatballs and one half-slice of cheese.
4. Place sandwiches and top halves of bread on a baking sheet
5. Bake 3 to 5 minutes or until cheese melts. Place top halves of bread on meatball sandwiches and serve.