1 c. sugar
3 tbsp. cornstarch
1/4 c. butter
1 tbsp. grated lemon rind
1/4 c. lemon juice (fresh)
3 egg yolks, beaten
1 c. milk
1 c. sour cream
1 (9") baked shell

Mix cornstarch and sugar in heavy pan. Add butter, lemon rind, juice, egg yolks and milk. Cook stirring constantly until thick and smooth. Cool a bit. Fold in sour cream and put in shell. Chill at least 2 hours or more. Serve with slightly sweetened whipped cream. Rich and delicious.