Pastry Mix

1 cup sugar3 tbsp. corn starch2 tbsp. flour1/4 tsp. salt2 cups boiling water3 egg yolks6 tbsp. lemon juiceGrated rind of 1 lemon1 tbsp. butter Mix dry ingredients. Add water slowly, stirring constantly. Cook on low fire until thick. Add beaten egg yolks, rind and juice. Cook 2 minutes longer until thick and smooth. Add butter;…