Fill a sling glass to the top with ice cubes
Place the pulp of a watermelon wedge into a shaker and muddle
Pour in 0.35 oz of lime juice, 0.5 oz of sugar syrup, 0.75 oz of lemongrass syrup and 1.5 oz of citrus vodka
Fill the shaker with ice cubes and shake
Finely strain into the sling glass
Top up with ginger beer and stir gently
Garnish with a small watermelon wedge on a cocktail skewer