Lemon Blitz Cake 1 angel food cake -- 1 lb * * * FILLING *** 1/4 Cup cornstarch 2/3 Cup sugar 1 2/3 Cups skim milk 1/2 Cup lemon juice 1 Tablespoon lemon rind -- freshly grated * * * TOPPING*** 3/4 Cup nonfat lemon yogurt 1 1/2 Cups light whipped topping I used 2% milk in this recipe. I like it.