Mamie Snyder'S Lemon Sponge
["1 1/2 c. sugar", "heaping Tbsp. flour", "grate the rind of 2 large lemons and also the juice", "3 egg yolks, well beaten", "1 c. milk", "sprinkle of salt"]
["Beat egg whites and add last.", "Put into unbaked pie shell; bake at 400\u00b0 for 8 minutes, then at 350\u00b0 for about 25 minutes. Don't let top get too dark."]
["sugar", "flour", "grate", "egg yolks", "milk", "salt"]