Combine cornstarch and 1 cup plus 2 tbl. of sugar, add water slowly, stirring constantly, until thick and smooth. Add slightly beaten egg yolks, butter, lemon rind and juice and salt. Cook 2 or 3 minute. Pour into baked shell. Cover with meringue made from 3 egg whites, beaten stiff and 2 tbl. sugar. Bake in a slow oven 15 minutes or untilbrown. ----