I generally add a bit of chopped cabbage for flavour. Chop mushrooms very fine, fry briefly. Fill wrappers with mushroom, seal edges. Drop in boiling barszcz. They are ready when they float to the top.
Fill leaves with rice and tomato or mushroom soup.
Serve with mushroom soup or tomato sauce. Any recipe for crepe will do. Roll up, folding down the ends so that they do not leak, and arrange in casserole dish. Warm in oven or microwave. Mix in milk and oil.