Passover Orange Sponge Cake - cooking recipe

Ingredients

1/3 cup matzo cake meal
1/2 cup potato starch
1/8 teaspoon salt
10 eggs, separated
1 cup granulated sugar, divided
2 tablespoons lemon juice
1 tablespoon orange rind, grated

Preparation

Preheat oven to 350\u00b0F
Sift together matzo cake meal, potato starch and salt, 3 times; set aside.
In large mixing bowl beat egg yolks until thick. Gradually add 1/2 cup sugar, lemon juice and orange rind. Continue beating until thick and fluffy. Fold in sifted dry ingredients.
In separate bowl beat egg whites until foamy. Add remaining 1/2 cup sugar gradually. Beat until stiff peaks form. Fold egg yolk mixture into egg whites.
Spoon into ungreased 10-inch springform tube pan. Bake for 45-50 minutes. Invert pan until cake is cool.