Peel and roughly chop 400g watermelon. Put in a blender with 100g sugar, and the juice of 3 limes and whizz until smooth.

Put into a large jug or punch bowl along with 100ml vodka and 1 bottle rosé.

Serve over ice.

To make a watermelon cooler (less alcoholic and more refreshing) increase the quantity of watermelon to 800g