Lemon Pie
["1 baked shell", "3 egg yolks", "1 c. sugar", "2 Tbsp. butter", "1/2 c. milk or water", "1 large lemon (juice and grated rind)", "3 Tbsp. flour"]
["Beat egg yolks, add other ingredients and cook over hot water until the mixture is of a jelly-like consistency.", "Pour into pastry shell; cover with meringue and bake in a slow oven about 15 minutes."]
["shell", "egg yolks", "sugar", "butter", "milk", "lemon", "flour"]