1/2 cup sugar
1 tablespoon cornstarch
1 cup water
1 tablespoon butter or margarine
2 tablespoons lemon juice
1/2 teaspoon lemon rind
Combine sugar and cornstarch in medium saucepan. Stir in water. Cook over moderate heat five minutes, stirring constantly with wire whisk, until smooth and bubbly. Add butter, lemon juice, and lemon rind. Stir until butter is melted.
This can be made ahead of time and reheated just before serving.