Meatball. If not defined, likely to be made with minced (US: ground) beef or veal, and served in a tomato-based sauce.
"Meatballs in the style of Naples." Meatballs made with ground beef and grated Parmesan cheese flavoured with garlic and other herbs and served in a tomato sauce.
"Meatballs in the style of the pizza maker." Meatballs made with ground beef cooked with tomatoes, mozzarella cheese, anchovies and basil.
A Sicilian dish of meatballs made with minced (US: ground) pork and grated Pecorino cheese and served with spring vegetables such as peas, beans and artichokes.