Keep cool this summer with this refreshingly fruity watermelon and raspberry cooler.
Put three-quarters of the sliced watermelon into a blender and add 200g (7oz) raspberries, the sugar and mint. Blitz to a purée, then pass the mixture through a sieve. Chill until needed.
Add enough watermelon purée to each tumbler to fill by half, add a couple of ice cubes, a few of the remaining raspberries and a reserved watermelon slice. Top up with sparkling water and decorate with extra mint leaves to serve.
See more Picnic recipes