Luscious Lemon Pie

1 Cup Sugar
3 Tablespoons Cornstarch
1 Tablespoon Grated Lemon Rind
¼ Cup Butter or Margarine
¼ Cup Fresh Lemon Juice
1 Cup Milk
3 Eggs Yolks, lightly beaten
1 (8 oz.) carton sour cream
1 baked 9-inch pastry shell
Whipped Cream
Garnish:  Grated Lemon Rind

Combine first 7 ingredients in a heavy saucepan.  Cook over medium heat 7 to 8 minutes or until smooth and thickened, stirring constantly.  Remove from heat.

Fold sour cream into filling, and pour into pastry shell; cover and chill at least 3 hours before serving.  Top pie with whipped cream, and garnish, if desired.

Yield:  1 (9 inch) pie.