Directions:

In a medium bowl, combine the sugar and flour. Stir in the milk, lemon juice, butter and lemon peel until blended. In a small mixing bowl, beat the egg yolks; add to the lemon mixture. Beat the egg whites until soft peaks form. Fold the egg whites into the lemon mixture. Pour into a greased 1-quart baking dish; set in a larger pan of water. Bake, uncovered, at 350 degrees for 55-60 minutes.