Muddle ginger, cucumber, and lime in a bowl.
Strain the mixture into your glass using a small strainer. Press on the mixture with your fingers or the back of a spoon to ensure all the juice is extracted from the ginger, cucumber and lime.
Clap the mint leaves together in your hands 3-4 times to release the oils and scent, then add them to your glass.
Add ice and top with half ginger beer, half sparkling water. Stir gently.
Garnish with your choice of lime wheels, ginger, cucumber or mint and serve.
