Step 1.
- Fill a cocktail shaker with ice.
Step 2.
- Add vodka, fresh lemon juice, and simple syrup to the shaker.
Step 3.
- Shake well until chilled.
Step 4.
- Strain the mixture into a Collins glass filled with ice.
Step 5.
- Top with soda water and stir gently.
Step 6.
- Garnish with a cucumber slice and a mint sprig.