Beat 2 eggs to a froth, with ½ teacup of sugar. Add, gradually, 1 pint of buttermilk, and a tablespoonful of butter, slightly warmed. Mix all these together, and pour into a shallow pastry-lined pie dish. Bake in a steady oven until set. Any flavouring may be used, but a little grated nutmeg on the top is usually liked.