Harvest Highball Courtesy of Ketel One Vodka. Ingredients1 ½ ounces Ketel One Citroen vodka2 ounces chilled ginger beer½ ounce lime juice½ ounce simple syrupInstructionsAdd ice, Ketel One Citroen vodka, lime juice and simple syrup into a cocktail shaker. Shake well. Strain into an ice-filled highball glass. Top with ginger beer. Garnish with a lime.