1 1inch x 1-inch cube of watermelon, frozen 1cice 1ozpremium vodka 1ozCointreau 1Tgrenadine syrup 1cwatermelon puree 1mini skewer of a small piece of watermelon, pineapple and a small strawberry 1inch x 1-inch cube of watermelon, frozen 1cice 1ozpremium vodka 1ozCointreau 1Tgrenadine syrup 1cwatermelon puree 1mini skewer of a small piece of watermelon, pineapple and a small strawberry Place the frozen watermelon cube in the bottom of a chilled martini glass. Place the ice, vodka, Cointreau, grenadine and watermelon puree in a shaker and shake for 30 seconds. Strain into the glass and garnish with the skewer. Makes 1 cocktail.