Lemon Filling - cooking recipe

Ingredients

1 cup sugar
4 tablespoons cornstarch
1/2 teaspoon salt
1 cup water
2 tablespoons lemon rind
1/2 cup lemon juice
2 tablespoons butter

Preparation

Mix ingredients in a saucepan.
Bring to a rolling boil and boil for 1 minute, stirring constantly.
Remove from heat and cool stirring occasionally.
Chill before using.