Lychee & Watermelon Granita

Pop a metal tray in the freezer

Drain lychees and add to a blender along with the watermelon, water and mint if using. Blend until smooth. (Depending on your type of blender you may have to strain the mixture with a fine sieve to remove any pulp). Pour into metal tray and freeze until partially set, about 3 hours. After 3 hours break up the ice that has formed with a fork and repeat this step every 30 minutes or so, for the next couple of hours until the granita has formed ice crystals