Lemon Sauce - cooking recipe

Ingredients

1 Tbsp. cornstarch or 1 1/2 Tbsp. flour
1/2 c. sugar
2 Tbsp. butter
1 c. boiling water
3 Tbsp. lemon juice and grated rind of 1 lemon
3 Tbsp. cold water

Preparation

Mix cornstarch (or flour) and sugar with 3 tablespoons cold water.
Stir into hot water in a double boiler.
Cook until thickened (20 to 30 minutes).
Add butter, lemon juice and lemon rind.
(Cook 2 to 10 minutes longer.)