Fill a highball glass with ice cubes to chill
In a cocktail shaker, combine the vodka, elderflower liqueur, fresh lime juice, and simple syrup
Add a handful of ice to the shaker
Shake vigorously to chill the mixture
Strain the mixture into the prepared highball glass
Top with club soda
Stir gently to mix
Garnish with fresh mint leaves and cucumber slices
Serve immediately and enjoy the refreshing taste of an endless summer
