Doberge Cake

1 ¼ cup sugar 3 tablespoon cornstarch 3 tablespoon all-purpose flour dash of salt 1 ½ cup cold water 2 tablespoon butter or margarine ½ teaspoon finely shredded lemon peel ⅓ cup lemon juice 3 beaten egg yolks

Lemon Icing

2 3 ounce package cream cheese, softened 3 cup powdered sugar 1 teaspoon finely shredded lemon peel ¼ teaspoon vanilla