Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  2               cups  flour
  1 1/2           cups  sugar
  3          teaspoons  baking powder
     1/2      teaspoon  salt
     1/2           cup  oil
  6                     eggs: separated
  3          teaspoons  grated grapefruit peel
     2/3           cup  grapefruit juice
     1/4      teaspoon  cream of tartar
                        - glaze-
  2               cups  powdered sugar -- sifted
  3          teaspoons  grapefruit peel -- grated
  1           teaspoon  vanilla
  3        tablespoons  grapefruit juice

Preparation:

In a small mixer bowl, stir together flour, sugar, baking powder and salt. Make a well in the center; in order, add oil, egg yolks, peel and juice. Beat smooth with an electric mixer. Wash beaters, and in a large bowl, beat egg whites with cream of tartar until stiff. Gradually pour flour mixture (it will be stiff) in a thin stream over surface, and fold in gently. Bake in a 10" ungreased tube pan for 55 minutes at 350~, or until when lightly touched with the finger, the cake springs back. Invert. Cool completely. Loosen edges, and remove to a cake plate. GLAZE: Mix all ingredients together, using enough grapefruit juice to make it spread easily, and drizzle down the sides when spread on top of the cake.

Nutritional Information:

407 Calories (kcal); 11g Total Fat; (24% calories from fat); 3g Protein; 75g Carbohydrate; 0mg Cholesterol; 254mg Sodium