Lemon Filling - cooking recipe

Ingredients

3/4 c. sugar
2 Tbsp. cornstarch
1/8 tsp. salt
1/2 c. water
1 egg, beaten
1 Tbsp. grated lemon rind
1 Tbsp. butter
1/4 c. lemon juice

Preparation

Mix first 4 ingredients together; bring to boiling.
Stir constantly.
Boil 2 minutes.
Stir some mixture into egg; return egg to hot mixture.
Cook 3 minutes.
Stir in rind, butter and juice.
Cool.
Fills 2 layers.