Aunt Ida'S Passover Sponge Cake

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   ["Sift cake meal and potato starch together and set aside.", "Add oil and vanilla to egg yolks.", "Add sugar and salt while beating.", "Continuing to beat, add orange juice alternately with sifted dry ingredients.", "Beat some more until creamy.", "Beat egg whites until stiff, and fold into egg yolk mixture.", "Pour batter to about 1 1/2"" from the top of an ungreased 10"" tube pan (an angel-food cake pan, with removable sides.) Bake at 325 degrees F.", "for 50-60 minutes.", "(There will be enough batter left over for an additional 8"" or 9"" round cake.) Invert to cool (important so cake won't collapse!)."]

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