Luo Songtang Luo Songtang (Russian, Ukrainian: борщ, Polish: Bals) is a kind of thick vegetable soup that originated in Ukraine. Luo Songtang is mainly made of beet, and potatoes, carrots, spinach, beef pieces and cream are often added for cooking, so it is purple. In some places, tomatoes are the main ingredients and beets are the auxiliary materials. There are also orange Luo Songtang and green Luo Songtang without beets and ketchup.