Well I have two versions.The first is more of a beef stew using cubed sirloin steak,browned on all sides.Remove,saute onion cut in fine slices,add sliced button mushrooms and some salt-brown well.Add a couple of shots of brandy(or cheap cognac)flambe.Return beef to pan.Reduce heat to low and add a good amount of good sour cream,season with black pepper, stew on a very low heat till beef is tender.Season with really good paparika at the end.

The other uses sliced tenderloin,shallots,mushrooms and sour cream,again adding paparika at the end as a garnish.

Buttered noodles tossed with black pepper and fresh chopped dill make a wonderfull side to this.