Apple Frosting For Gingerbread

Grrrrrgh!
Course : Frostings
From: HungryMonster.com
Serves: 1
 

Ingredients:

1 large egg white
1 cup sugar
1 medium apple -- peeled and grated
1 dash cream of tartar
1 1/2 cups solid shortening
8 large egg whites
2 1/2 pounds sifted powdered sugar
 

Preparation:

Beat white of egg with part of sugar. Add cream of tartar. When quite stiff, add grated apple gradually. This should be used immediately as standing will cause it to separate.