Lemon Surprise Pie

1 c. sugar
3 T cornstarch
1/4 c butter
1 T grated lemon rind
1/4 c. lemon juice
3 unbeaten egg yolks
1 c. milk
1 c. sour cream

Combine sugar and cornstarch in a saucepan. Add butter, lemon rind, lemon juice, and egg yolks. Stir in milk. Cook over medium heat, stirring until thick; cool. Fold in sour cream. Spoon into 9" baked pie shell (or graham cracker crust). Chill at least 2 hours. Top with 1 packege of prepared Dream Whip or Cool Whip.

*I tried this recipe to use up the egg yolks from the waffles. We inhaled the pie before I could take a picture. =D