Stir the meat, mushrooms and onions into the sauce. Check the seasoning and heat till not quite boiling. The mixture should be quite thick.
Make the first thin pancake, put a tablespoonful of the mixture on one half and roll up as tightly as possible. Lift on to a hot dish and keep hot while you make the rest. Lay them in a row on the dish. When all are done sprinkle with the cheese and