Uszka or vushka (Polish "little ears") are small dumplings (a very small and twisted version of pierogi) usually filled with flavorful wild forest mushrooms or minced meat. They are usually served with barszcz, though they can be eaten simply with melted butter and herbs (usually chives) sprinkled over.
When vegetarian (filled only with mushrooms or onion) they are a part of traditional Christmas Eve dishes in Poland and Ukraine, and are either added to the soup, or eaten as a side dish.