1½ oz green Chartreuse5 mint leaf½ oz lime juice¼ oz simple syrup (1:1)2½ oz soda water
instructions :

Add the mint, lime juice and simple syrup to a shaker and muddle lightly.
Add ice and the Chartreuse and shake until chilled.
Strain into ice-filled glasses, top with club soda and garnish.

source :
imbibemagazine.com