Poppy Seed Cake (Czechoslovakia)

6 eggs, separated
1 1/2 cups granulated sugar
1 1/2 cups flour
1/4 teaspoon salt
1/2 teaspoon cream of tartar
1/2 cup cold water
1 teaspoon vanilla extract
3/4 cup poppy seed

Add salt to egg whites and beat until foamy, then add the cream of tartar and beat until stiff. Add 1/2 cup of the sugar. Beat well and set aside.

Beat egg yolks; add 1 cup of sugar and beat well. Add cold water to mixture and beat until lemon colored. Add flour; beat well. Fold into the egg whites. Fold in poppy seed carefully. Pour into an ungreased angel food pan and bake at 325 degrees F for 1 hour. Invert until cool.

When cool, cut into two layers. Put a butter cream frosting between layers.