Soften gelatin in water. Drain cherries, reserving juice. Beat egg yolks and add juice from cherries (¾ c.), salt and ½ c. sugar. Cook over low heat until thickened, stirring constantly. Stir in softened gelatin and stir until it is dissolved. Cool slightly and add lemon peel and drained cherries (1½ c.).
Beat egg whites until soft peaks form when beater is lifte