Mash the mint leaves using a muddler. If you do not have one (which I don't!) place the mint leaves in a dish and smash with the back of a large spoon to release the juices.
Remove and discard the rind of the watermelon and all visible seeds. Place the watermelon slices in a food processor and puree until smooth.
In a large pitcher, add the mint leaves, pureed watermelon, rum, simple syrup and the lime juice. Stir to combine.
Serve in glasses with ice and garnish with a watermelon slice and a mint leaf.
Simple Syrup Recipe
Bring the water to a boil in a small saucepan. Once boiling, add the sugar. Stir constantly until dissolved. Remove from heat and allow to cool completely.
by The Savvy Kitchen