1 baked pie shell
Finely grated rind of 3 lemons
1/4 c. lemon juice
4 egg yolks
1/3 c. cornstarch
1 1/2 c. sugar
1/4 tsp. salt
1 1/2 c. warm tap water
2 tbsp. butter

Mix ingredients; pour into baked pie shell. Let set. Serve at room temperature.