Raspberries selected. Wash the nectarines, dab dry, cut in half and remove the stone. Cut halves into thin slices and arrange on 4 plates. Sprinkle with raspberries. Wash lemon balm and dab dry.
Remove 8 leaves and cut into fine strips. Mix lemon juice, Grand Marnier and sugar. Add strips of lemon balm and spread the marinade over the nectarines. Serve garnished with the remaining lemon balm.