2 parts 42BELOW Vodka
Dash of Campari
Dash of simple syrup or sugar syrup
A large slice of watermelon, finely diced.
In a cocktail shaker, crush finely diced watermelon flesh with a muddler of the back of a bar-spoon, trying to extract as much juice as possible. Add spirits and simple syrup, and shake hard for several seconds. Strain into a chilled Martini glass.