Mince finely any odds and ends of cold mutton, and mix it with an equal quantity of boiled rice, adding the yolk of an egg and sufficient milk to form a thick paste. Season to taste and fill a number of lettuce leaves with the mixture, rolling each carefully. After simmering in a little stock or water for half an hour, drain and arrange them on a dish, and pour over them a sauce made of yolk of egg beaten in milk, with a little parsley and lemon juice.