Sour Cream Lemon Pie
["1 c. sugar", "3 1/2 Tbsp. cornstarch", "1 Tbsp. lemon rind, grated", "1/2 c. lemon juice", "3 egg yolks, beaten", "1 c. milk", "1/4 c. butter", "1 c. sour cream", "1 baked (9-inch) pie shell", "Cool Whip"]
["Combine sugar, cornstarch, lemon rind, juice, egg yolks and milk in heavy saucepan; cook over medium heat until thick, stirring constantly.", "Stir\tin butter and cool mixture to room temperature.", "Stir in", "sour", "cream\tand", "pour filling into pie shell.", "Cover with Cool Whip.", "Store in refrigerator."]
["sugar", "cornstarch", "lemon rind", "lemon juice", "egg yolks", "milk", "butter", "sour cream", "shell"]