Cabbage

It is widespread in central and eastern Europe.

An excerpt from the article 19 facts about cabbage

Many traditional dishes are prepared using cabbage. In Poland and Lithuania, everybody loves bigos (sauerkraut with chopped meat, mushrooms, and spices), sauerkraut (eagerly served along grilled sausages), and gołąbki (boiled cabbage leaves stuffed with minced meat combined with rice and spices, and cooked in tomato sauce).