Preheat oven to 350 degrees.
Coat a baking sheet with nonstick cooking spray or a thin layer of olive oil.
In a large mixing bowl, combine ground chicken, panko, Parmesan, egg, garlic, salt, oregano, basil, and black pepper.
Mix well. (I prefer to use my hands to make sure it is thoroughly combined.)
Form mixture into balls the size of walnuts.
Place on prepared baking sheet, an inch or two apart.
Bake for 12 minutes.
Cover the bottom of a medium-sized casserole dish with marinara.
Add meatballs and top with additional marinara.
Bake for 15 minutes.
Remove from oven, and sprinkle with mozzarella.
Bake for 15 additional minutes or until cheese is fully melted.