Lemon Meringue Pie
["1 baked pastry shell", "1 2/3 c. sugar", "6 Tbsp. cornstarch", "1/2 c. lemon juice", "4 eggs, separated", "1/2 c. boiling water", "2 Tbsp. butter", "1/4 tsp. cream of tartar"]
["Preheat oven to 350\u00b0.", "In heavy saucepan, combine 1 1/3 cups sugar and cornstarch; add lemon juice.", "In small bowl, beat egg yolks.", "Add to lemon mixture.", "Gradually add water, stirring constantly.", "Over medium heat, cook and stir until mixture boils and thickens, about 8 to 10 minutes.", "Remove from heat.", "Add butter; stir until melted.", "Pour into prepared pastry shell."]
["pastry shell", "sugar", "cornstarch", "lemon juice", "eggs", "boiling water", "butter", "cream of tartar"]