This plum gin cocktail is a blend of fresh ingredients and aromas. Thanks to the addition of fresh plum and St. Germain there is no need to add any additional sugar. Instead, I pair it with rosemary for a fresh and herbaceous drink.
In a cocktail shaker, combine the plum chunks and rosemary sprig with a splash of soda water. Muddle until you begin to smell the rosemary (less muddle is more - press your muddler down and give it a few gentle twists to start.)
Add several ice cubes, gin and St. Germain to the shaker. Shake or stir vigorously. Add ice cubes to a glass, then strain shaker mixture over the ice. Garnish with plum slices and/or rosemary sprigs as desired.