In a large bowl, combine cheese, bread crumbs, onion, chives, garlic, salt, pepper, oregano and mix well. Add turkey and egg and blend with your hands until well mixed. Make a small test patty to test for flavor and adjust for your liking. While you are cooking your patty cover mixture and chill. These are easiest to form into balls while very cold. Form into 28 meatballs, each about 1¼-inches in diameter