Follow these simple steps to create your Garlic Bread Alfredo Meatball Subs:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Meatballs: In a large bowl, combine ground beef or sausage, breadcrumbs, Parmesan cheese, chopped parsley, egg, garlic powder, onion powder, salt, and pepper. Mix until well combined.
3. Form Meatballs: Roll the mixture into meatballs, about 1 inch in diameter.
4. Cook the Meatballs: In a large skillet, heat olive oil over medium heat. Add the meatballs and cook until browned on all sides, about 8-10 minutes. Remove from heat.
5. Add Alfredo Sauce: Pour the Alfredo sauce over the cooked meatballs, ensuring they are well coated. Simmer for 5 minutes until heated through.
6. Prepare the Bread: Slice the sub rolls or garlic bread loaves in half lengthwise. Place them on a baking sheet.
7. Fill the Subs: Spoon the meatballs and Alfredo sauce into each bread half, generously filling them.
8. Add Cheese: Top each filled sub with shredded mozzarella cheese.
9. Bake: Place the baking sheet in the oven and bake for 10-15 minutes, or until the cheese is melted and bubbly.
10. Garnish and Serve: Remove from the oven, garnish with fresh parsley if desired, and serve immediately.

These steps will guide you in creating mouthwatering Garlic Bread Alfredo Meatball Subs that everyone will love!