Lemon Sponge Cake
["3 Tbsp. softened butter or margarine", "4 eggs, separated", "dash of salt", "grated peel of 2 lemons", "1 unbaked 9-inch pie shell", "1 1/4 c. granulated sugar", "3 Tbsp. white flour", "1 1/4 c. milk", "1/3 c. lemon juice"]
["In a large bowl, cream butter and sugar together until fluffy. Beat in egg yolks, flour, salt, milk, lemon peel and juice.", "In a small bowl, beat egg whites until stiff, but not dry.", "Fold egg whites into mixture.", "Pour into pie shell.", "Bake in a 375\u00b0 oven that was preheated for 15 minutes; reduce heat to 300\u00b0 and continue baking for 45 minutes longer or until top is golden and pick comes out clean.", "Cool on wire rack.", "Serves 8."]
["butter", "eggs", "salt", "lemons", "shell", "sugar", "white flour", "milk", "lemon juice"]