2 (1/2-inch thick) Slices Cucumber
2 1/4 oz Gin
3/4 oz Orange Bitters
Garnish: Lemon twist.

Boxcutters, Jigger, Mixing-glass, Muddler, Strainer, Stirrer (long Spoon), Coupe Glass.

Add the Cucumber slices to the bottom of a Mixing-Glass. Muddle them to break up, but do not pulverize completely.
Add Gin and Bitters to Mixing-Glass then fill 2/3 with ice and stir until well chilled, about 20 seconds. Strain into a chilled Martini Glass, garnish with Lemon twist and serve.