Roast the onion slices in butter until golden, fry the apple slices in butter, but do not let them disintegrate. Turn the veal liver in flour, shake off the excess flour and fry the slices on both sides, keeping the inside pink. They are only seasoned with salt and pepper after roasting.
Dish up the liver; Garnish each slice with a spoonful of onions and three apple slices, pour the clarified butter over them and sprinkle with chopped parsley.