Chop the onion finely and fry in half of the butter to yellowing, add the flour and the chopped mushrooms fry is flooded with cream and broth and stir. Steaks are lightly crushed Add salt, sprinkle pepper, fry on both sides in the rest of the butter, add the mushroom sauce and stew half an hour. Add the diced potatoes, add salt, sprinkle pepper and stew until soft.