Step 1In a cocktail shaker, combine the torn shiso leaf, grapes, honey syrup, vanilla and gentian, if using. Add the Seedlip and yuzu, along with a few ice cubes. Shake vigorously for 3 seconds. Pour the mixture into the glass of your choice, add more ice and fill with soda water. Garnish with the grape sprig and 1 to 2 shiso leaves.