Cut 3 slices of cucumber (1 cm) into quarters and muddle* in the cocktail shaker.
Then pour gin, sugar, lemon, and egg whites into the shaker and dry shake for 10-15 seconds.
Next, add ice cubes to the shaker and shake again for 15-20 seconds.
Use a fine strainer to remove any cucumber slices into a lowball glass with ice cubes.
Top with ginger beer and garnish with cucumber.
Keep the display on
Notes
To "muddle" means to mash and mix in. What happens when you muddle is that aromas and flavors are released from the ingredient, in this case, a cucumber.Glass: Lowball Ice: Cubes