Old Time Lemon Pie
["9-inch baked pastry shell", "1 1/2 c. sugar", "7 Tbsp. cornstarch", "dash of salt", "1 1/2 c. water", "3 beaten egg yolks", "1 tsp. grated lemon peel", "2 Tbsp. butter or margarine", "1/2 c. lemon juice", "3 egg whites", "1 tsp. lemon juice", "6 Tbsp. sugar"]
["Combine sugar, cornstarch and salt in saucepan.", "Stir in water.", "Bring to a boil over medium heat, stirring constantly until thick (3 to 5 minutes).", "Remove from heat; stir a small amount of hot mixture into egg yolks; then pour into remaining hot mixture in pan.", "Bring to a boil and cook one minute, stirring constantly.", "Remove from heat; add lemon peel and butter.", "Slowly stir in lemon juice.", "Cool to lukewarm; pour into pastry shell."]
["pastry shell", "sugar", "cornstarch", "salt", "water", "egg yolks", "butter", "lemon juice", "egg whites", "lemon juice", "sugar"]