Wash the apple, dab dry, core and cut into slices. Wash limes hot, grate dry, cut into slices, press briefly. Collect escaping juice. Wash lemon balm, dab dry and remove leaves from the stalks. Place the prepared ingredients with the lime juice in a large container, mix carefully with tonic water and woodruff syrup, chill and leave to stand for approx. 30 minutes. Fill with plenty of ice cubes and serve
30 minutes waiting time