Combine all the meatball ingredients in a large mixing bowl. Mix to combine. Shape into small balls, using about 1 tablespoon of mixture per ball. Place on the prepared baking sheets and spray the meatballs lightly with cooking spray. Bake for 10 minutes, flip the meatballs over, and cook for another 5 minutes or until they are browned and feel firm to the touch. Transfer the meatballs to a plate lined with paper towels to absorb any extra fat.