Mix corn starch and sugar in saucepan. Add boiling water, stirring constantly. Cook until thick and clear. (about 10 minutes) Add salt to egg whites; beat until stiff, then add 3 teaspoons sugar; then add vanilla. Beat until egg whites are creamy. Pour hot corn starch slowly into egg whites (beating constantly) and until stiff. Pour into 9 inch pie shell. Decorate with coconut. (colored coconut optional) One large pie.