Place the watermelon cubes in a cocktail shaker cup.
3-4 chunks of watermelon
Add the mint and granulated sugar, then pour in the fresh lime juice.
3 fresh mint leaves, 1/2 tablespoon granulated sugar, Juice of one lime
Muddle to release the fresh watermelon juice and mint flavor and continue until the sugar dissolves. (You can also use superfine sugar – it will dissolve more easily.)
Add the rum , then a handful of ice and shake well to combine and chill the drink.
1 1/2 ounces white rum, Ice
Pour into tall glasses and top with a splash of club soda.
1 splash club soda
Garnish with a fresh watermelon slice, a lime wedge, and fresh mint sprigs.
Lime and small watermelon slices for garnish