Lemon Sponge Pie
["1/4 c. margarine", "1 c. sugar", "3 Tbsp. flour", "3 eggs, separated", "1/2 c. lemon juice", "1 Tbsp. grated lemon rind", "1 1/2 c. milk", "pastry for 9-inch pie"]
["Cream well margarine and sugar.", "Add sugar and flour; mix well.", "Add egg yolks, lemon juice and rind.", "Beat well.", "Slowly add milk while beating.", "Fold in beaten egg whites.", "Pour into pastry-lined pie plate.", "Bake 12 minutes at 425\u00b0.", "Reduce heat to 325\u00b0 and bake for 30 minutes longer."]
["margarine", "sugar", "flour", "eggs", "lemon juice", "lemon rind", "milk", "pastry"]