1/4 cup Blackberries, Fresh, plus extra for garnish
5 sprigs Fresh Tarragon
Fresh Lime Juice, From 1/2 lime
1/2 ounce Simple Syrup
2 ounces Gin
Fill your cocktail shaker with the cucumber slices, blackberries, tarragon, lime juice and simple syrup and muddle the mix together with a muddler until the berries are crushed and they release their juices.
Pour in the gin and stir.
Fill a Collins glass with ice and strain the cocktail, discarding any solids. Top with club soda and garnish with slices of cucumber and blackberries.