Preheat oven to 450°F. Line a rimmed baking sheet with foil and spray with olive oil or nonstick spray; set aside.

In a large bowl, combine all of the ingredients for the Chicken Meatballs (chicken, egg, breadcrumbs, pepper, salt, garlic powder, onion powder, basil and Parmesan). Mix until well combined.

Form the mixture into 1¼”-1½” meatballs. Place meatballs on the foil-lined baking sheet.

Bake meatballs at 450°F for 17-18 minutes, or until juices run clear. (Note: An instant-read thermometer inserted into the center of a meatball should read at least 165°F.)

Cut a wedge into the tops of the sub rolls and remove a bit of the bread from the middle of the rolls. Place rolls under a broiler until slightly crispy (2-3 minutes). (Note: Watch the rolls closely to keep them from burning!)

Spread 2 Tbsp of marinara sauce into each of the rolls. Add the cooked chicken meatballs and top each roll with another 2-3 Tbsp of marinara sauce. Sprinkle the mozzarella cheese and chopped basil evenly across the tops of the rolls. Place subs on a baking tray and return to broiler until cheese has melted (1-2 minutes, but watch closely!).