This recipe for polish potato dumplings or kopytka (koh-pit-kah) is made with cooked mashed potatoes. Their name means "Little hooves" Because of their shape. Don't use leftover mashed potatoes that have previously been mixed with milk and butter. Potatoes cooked in their jackets and freshly mashed or ground in a food mill are the way to go. Many people consider these dumplings the polish equivalent of italian gnocchi. Kopytka are excellent with buttered bread crumbs (polonaise-style) as a side dish or with the pan juices or gravy from roasted meats or poultry. Compare kopytka with pyzy dumplings.