Lemon Pie
["9-inch baked pastry shell", "1 1/2 c. sugar", "4 tsp. all-purpose flour", "4 tsp. cornstarch", "1/2 tsp. salt", "2 c. boiling water", "4 egg yolks", "1/3 c. lemon juice", "2 lemons, grate rind", "4 egg whites for meringue"]
["Mix sugar, flour, cornstarch and salt together.", "Add to boiling water, stirring constantly and cook over low heat until mixture is thickened and transparent in color.", "Add beaten egg yolks; stir well.", "Remove from heat; add lemon juice and rind. Cool; pour lemon filling into pastry shell.", "Make meringue and cover top of pie."]
["pastry shell", "sugar", "all-purpose flour", "cornstarch", "salt", "boiling water", "egg yolks", "lemon juice", "lemons", "egg whites"]