Preparation / Directions:
To prepare batter: 1. Start heating oven to 350 degrees F. In a large bowl, beat egg yolks, orange juice, sweetener, water, vanilla extract and orange peel until yolks are very pale yellow, fluffy and the consistency of whipped cream - 10 to 30 minutes. (The yolk mixture will almost fill the bowl.) 2. With mixer at medium spped, beat in cake flour and salt, a heaping tablespoon at a time, until all has been added and mixture is smooth. (The volume will decrease as the flour is added.) 3. In a large bowl, beat egg whites until frothy; add cream of tartar. Continue beating until whites form very stiff peaks. 4. Drizzle about 1/4 of yolk mixture over whites; gently fold two together until smooth. Repeat 3 times.
To bake the cake: 5. Pour batter into a 9 or 10 inch tube pan with a removeable bottom; smooth surface of batter; bake 55 to 65 minutes, or until surface of cake is light brown and a cake tester, inserted in center, comes out clean. Invert pan to cool.