Watermelon and Ginger Cooler
2.5cm/1in piece fresh root ginger
juice of 3 limes
1–2 tbsp sugar
chilled sparkling water
1 Peel the watermelon and remove the seeds. Roughly chop the flesh and place in a blender.
2 Peel and chop the ginger. Add to the blender with the lime juice and blitz until smooth. Sweeten with sugar to taste.
3 Pour into two large glasses and top up with sparkling water.