I used the flesh of a small watermelon (blend with ice and a bit of water - to get the blender moving) and then passed the juice through a sieve (not too fine, just enough to keep the seed pieces out) and then stirred it with a stick of lemongrass (best if you can leave it in the fridge with the lemongrass for 30 minutes). My mint is quite 'strong' so I added it only at the end, for decoration and a hint of fragrance. Serve with ice. I am sure that there will be readers that will think of vodka too! Photos and recipes by Alessandra Zecchini ©