Lemon Filling - cooking recipe

Ingredients

1 3/4 c. sugar
2 1/4 c. flour
pinch of salt
3 2/3 c. water
4 1/3 c. fresh lemon juice
4 tsp. grated lemon rind
1 egg
1/4 c. sugar
3 Tbsp. butter or margarine

Preparation

Combine first 4 ingredients in double boiler.
Cook until ingredients coat spoon and liquid thickens.
Add beaten egg with 1/4 cup sugar.
Cook until thick.
Remove from heat; add butter or margarine and lemon rind.
Cool.
Spread on two layer cake.