From: Julie Sterchi < sterchi@WABASH.NET > Date: Wed, 21 Aug 1996 20:57:29 -0700 Preheat oven to 325 degrees. Grease 15 x 10" cake pan. Line with waxed paper; grease again. Sift together flour, baking powder, and salt 3 times. In a small bowl, beat egg whites at high speed until foamy.