Fluffy walnut cake

Ingredients

Ingredients: 

3/4 c Matzo meal 
3/4 c Potato starch 
1/2 ts Salt 
6  Egg yolks 
1 3/4 c Sugar 
1 c Orange juice 
1 1/2 c Ground walnuts 
1 tb Grated lemon rind 
6  Egg whites; stiffly beaten 

Instructions

Mix the matzo meal, potato starch and salt together. Beat yolks until thick; gradually add the sugar, beating until lemon colored. Add matzo-meal mixture alternately with the orange juice. Fold in the walnuts and lemon rind, and then the egg whites. Turn into a 9-inch tube pan. Bake in a 325 degree oven 1 hour or until browned and the cake shrinks away from the sides of the pan. Cool on a cake rack. Serves 6 to 8.