Preheat oven to 350 degrees. Spray an 8" X 8" baking pan with nonstick spray.
In a medium bowl, combine all topping ingredients. Gently mix until uniform. Cover and refrigerate. In a large bowl, combine ground beef, breadcrumbs, egg whites/substitute, garlic, onion powder, salt, and black pepper. Firmly and evenly form into 12 meatballs. Lay meatballs in the baking pan, and evenly top with marinara sauce. Cover pan with foil, and bake for 20 minutes.
Remove foil, and bake until meatballs are cooked through, about 10 minutes.
Sprinkle with mozzarella and Parmasan. Bake until mozzarella has melted, about 5 minutes.