Passover Sponge Cake
["9 eggs (separate whites)", "1 1/2 c. sugar", "1/4 c. oil", "juice of 1/2 orange and 1/2 lemon (1/4 c.)", "1 full c. matzah cake meal and potato starch, combined", "rind of lemon and orange (1 Tbsp.)"]
["Beat egg whites until frothy.", "Add a pinch of salt.", "Gradually add 1/2 cup sugar to whites.", "Beat until glossy and peaks form. Beat egg yolks in another bowl.", "Gradually add the oil, sugar and juice.", "Beat well about 5 minutes or so until light in color and thick.", "Add rind."]
["eggs", "sugar", "oil", "orange", "matzah cake", "rind of lemon and orange"]