1 c. sugar
3 tbsp. cornstarch
Dash salt
1 c. milk
3 eggs separated
4 tbsp. butter
1 tsp. shredded lemon peel
1/4 c. lemon juice
1 c. dairy sour cream
1 (9-inch) pastry shell
1/4 tsp. cream of tartar
1/2 tsp. vanilla
6 tbsp. sugar

Combine sugar, cornstarch and salt. Slowly stir in milk. Cook and stir until mixture boils and is thickened. Blend small amount of hot mixture into slightly beaten egg yolks. Return to hot mixture.

Cook and stir approximately 5 minutes - mixture should be very thick. Add butter, lemon peel and lemon juice. Cover and cool. Fold in sour cream. Spoon into baked 9-inch pastry shell.