Lemon Sponge Custard Pie
["3 Tbsp. butter or margarine", "1 c. sugar", "2 eggs, separated", "juice of 1 lemon", "3 Tbsp. flour", "1/8 tsp. salt", "1 c. milk", "1 (9-inch) pie crust (unbaked)"]
["Cream butter.", "Add sugar, egg yolks, lemon juice, flour and salt.", "Mix well.", "Stir in milk.", "Beat egg whites until stiff.", "Fold egg whites into 1st mixture.", "Pour into crust-lined pie plate. Bake at 450\u00b0 for 10 minutes, then 35 more minutes at 350\u00b0."]
["butter", "sugar", "eggs", "lemon", "flour", "salt", "milk", "pie crust"]