Cut the meat into 8 patty (side muscle), with slightly tapering Pip, add salt and sprinkle with pepper. Mushrooms, finely chopped, sauté in the butter until soft and mix with ham, pickles and boiled potatoes, cut into small cubes, and mustard. The resulting filling is distributed schnitzel, which are wrapped in a roll tied with strong thread, rolled in flour and fry in very hot oil.