Stir 2 tablespoons of water or the melted fat into the meat, salt to taste, form flat dumplings, notch them with a knife and fry them quickly in the hot butter (margarine) (approx. 4 minutes on each side). At the same time in the pan on the side brown the sliced onions with which the meat is served. Thicken the roast set, boiled loose with water, with the mixed cornstarch and season with salt and pepper.