Water-Beat Pastry

1/2 cup cold water7 tbsp. cornstarch1-1/2 cups hot water1-1/4 cups sugar3 egg yolks, slightly beatenJuice of 2 lemonsGrated rind of 1 lemon1 tbsp. butter Mix ccld water and cornstarch until smooth. Combine hot water and sugar in top of double boiler, bring to a boil over direct heat. Add cornstarch mixture, cook until it begins…