Polpette al sugo is a traditional dish consisting of meatballs in sauce. Although there are numerous recipes, the meatballs are usually made with a combination of ground meat (beef or veal), eggs, bread soaked in milk, Parmigiano-Reggiano cheese, parsley, salt, and pepper.
Once shaped, the meatballs are browned in a pan and then cooked in a sauce consisting of onions, olive oil, tomatoes, and seasonings. The dish is covered with a lid and cooked over low heat until the sauce thickens and the meatballs are fully cooked.