French Apple Souffle

Cook apples and sweeten to taste. Mash well with 1 tablespoonful of
butter. Beat the yolks of 3 eggs with 2 tablespoonfuls of sugar, the
juice and rind of 1/2 lemon; add the whites beaten to a stiff froth.
Put in a buttered pudding-dish and bake in a moderate oven until done.