What you'll need:
1/2 small seedless watermelon, cut into chunks
1 bunch mint, tough stems removed
1 tbs superfine sugar
1 lime cut into wedges
1 1/4 cups white rum
What you'll do:
1. In a blender, puree watermelon. Pour through a fine mesh sieve into a liquid measuring cup.
2. in a large container, combine mint, sugar and lime. with the back of a wooden spoon, crush mint and lime until sugar is dissolved. add watermelon juice and rum, fill container with ice and stir to combine.
serve over more ice with mint sprigs