Peel and chop the ginger. Sort 100 g raspberries. Wash limes, grate dry and grate the peel thinly. Halve limes and squeeze juice. Quarter melon, remove seeds, peel flesh and cut into small pieces.
Puree the ginger, raspberries, melon, lime juice and peel in a universal blender, except for something for decoration. Chill the cold bowl for about 30 minutes.
12 raspberries selected. Wash mint, shake dry, pluck leaves and cut into fine strips. Serve the soup in deep plates. Garnish each plate with 3 raspberries, mint and lime zest.