Sponge Cake - cooking recipe

Ingredients

7 eggs
1/2 c. orange juice (unsweetened)
1 Tbsp. orange rind
3 tsp. liquid sweetener
1/2 tsp. vanilla
2 Tbsp. lemon juice
1 1/2 c. sifted flour
1/4 tsp. cream of tartar

Preparation

Separate eggs.
Beat yolks until light.
Mix together orange juice and rind, sweetener, vanilla and lemon juice.
Add to egg yolks.
Beat until fluffy (about 7 to 10 minutes).
Combine flour and salt.
Gently sprinkle flour mixture over egg yolks, folding in a little at a time.