In mixer bowl, beat cheese until fluffy. Gradually beat in Eagle brand until smooth. Stir in lemon juice & vanilla. Pour into prepared crust. Top with golden lemon topping. Golden lemon topping: In saucepan, combine sugar & cornstarch. Add water, real lemon juice, & egg yolk; mix well. Over md heat, cook & stir until thickened. Remove from heat. Stir in margarine or butter until melted. ~