Moisten two level teaspoonfuls of cornstarch with a half cupful of cold water, stir constantly until it reaches the boiling point, boil about two minutes and add a tablespoonful of sugar; take from the fire, add a grating from the yellow rind of an orange and two tablespoonfuls of orange juice; and pour while hot into the well-beaten white of one egg. Turn this at once into a little glass stemmed dish and put in the refrigerator to cool. At serving time fill the dish with orange juice and stand it on a pretty mat on a service plate.