Passover Sponge Cake (Plava)

Ingredients

9 egg whites
9 egg yolks
1 1/3 cups confectioners' sugar
1 1/2 lemons, juiced
1/2 cup potato flour
1/2 cup matzo cake meal

Directions

1. Beat whites until stiff. Beat in confectioners' sugar. Beat together yolks and lemon juice: fold yolk mixture into egg whites. Fold in potato flour and matzo meal. Pour batter into ungreased tube pan.

2. Bake at 375 degrees F (190 degrees C) for approximately 1 hour.