of double boiler; Cook over boiling water 5 minutes or until thichened, stirring constantly; Remove from heat; Beat egg whites and salt in large bowl until soft peaks form. Gradually add remaining 1/2 C sugar, beating until stiff and glossy; Fold egg white mixture into lemon mixture; Pour into cooled crust. Refrigerate until set; Garnish with whipped cream and lemon peel.JM. ----