Preheat Oven:
Preheat oven to 400°F (205°C).Mix Chicken Mixture:
In a large bowl, mix ground chicken with grated onion.Add Seasonings and Binder:
Add garlic, parsley, egg, Italian seasoning, cayenne, salt, pepper, panko, and Parmesan. Combine with hands or spatula until just incorporated; avoid overmixing.Form Meatballs:
Using a small scoop or tablespoon, scoop meatball mixture and roll into balls.Arrange on Sheet:
Spray a baking sheet or wire rack with olive oil. Arrange meatballs 1/2 to 1 inch apart. Mist tops generously with olive oil.Bake Meatballs:
Bake 18-20 minutes until golden and fully cooked. Remove at first sign of browning to retain moisture.Rest and Garnish:
Let rest 3-5 minutes. Garnish with fresh parsley and extra Parmesan. Serve right away.Serve with Sauce:
Serve as an appetizer with dipping sauce, or alongside pasta.