
In a large mixing bowl, combine the ground turkey, egg, breadcrumbs, garlic, salt, pepper, onion powder and chopped parsley. Mix gently but thoroughly to combine.
Spray the basket of an air fryer with olive oil cooking spray.
Divide the mixture into 16 equal portions (about 35g or 1½ tablespoons each) and roll them into balls.
Place the meatballs in the air fryer, leaving a small amount of space in between each. (If needed, cook these in two batches, depending on the size of your air fryer.) Lightly spray the tops of the meatballs with the olive oil spray.
Air fry at 400°F for 10 to 12 minutes, or until the internal temperature of each meatball reaches 165°F on an instant-read thermometer. Serve immediately topped with more chopped parsley, if you like.