1 (9-inch) pastry
3 tbsp. softened butter
1 1/4 c. sugar
4 eggs, separated
3 tbsp. flour
dash of salt
1 1/4 c. milk
1/3 c. lemon juice

In mixer, cream butter and sugar until fluffy. Beat in egg yolks, flour, salt, milk and lemon juice. In bowl, beat egg whites until fluffy, then add to mixture.

Bake 15 minutes at 375°F then 45 minutes at 300°F until lightly golden.