In a large bowl, add the raw ground chicken, diced onion, garlic powder, ¼ ketchup, worcestershire sauce, egg, salt, and black pepper. Mix all ingredients together with a fork. Once mixed thoroughly, mix in the grated parmesan cheese.
16 oz Ground Chicken, ½ cup Onion, 1 Large Egg, ½ cup Ketchup - divided ¼ for mixing in and ¼ for topping, ½ teaspoon Salt, ½ teaspoon Ground Black Pepper, 3 teaspoons Worcestershire Sauce, 1 teaspoon Garlic Powder, 1 cup Parmesan Cheese