Sour Cream Lemon Pie
["2/3 c. sugar", "3 Tbsp. cornstarch", "1 c. milk", "yolks from 3 large eggs", "1 tsp. freshly grated lemon peel", "1/4 c. lemon juice", "1/4 c. butter, cut in small pieces", "1 c. sour cream", "1 (9-inch) baked and cooled shell", "whipped cream, lemon slices, fresh mint sprigs (for garnish)"]
["Mix sugar and cornstarch in medium saucepan.", "Whisk in milk until smooth, then yolks until blended.", "Stir in lemon peel and juice.", "Add butter and whisk constantly over medium heat 5 to 7 minutes just until boiling.", "Remove from heat and stir 1 minute longer.", "Cover with plastic and cool.", "Stir in sour cream until blended.", "Pour into pie shell.", "Cover loosely and refrigerate at least 6 hours or up to 2 days.", "Before serving, add garnishes. Serves 8."]
["sugar", "cornstarch", "milk", "yolks from", "freshly grated lemon peel", "lemon juice", "butter", "sour cream", "cooled shell", "whipped cream"]