Lemon Sauce - cooking recipe

Ingredients

1 1/2 Tbsp. cornstarch
1/2 c. sugar
1/4 tsp. salt
1 c. boiling water
1 1/2 Tbsp. lemon juice
1 rounded Tbsp. butter

Preparation

Mix sugar, cornstarch and salt together.
Gradually add boiling water, stirring constantly.
Boil 5 minutes; add remaining ingredients.
Serve hot over cake.