3/4 oz of Gin
1/4 oz of green chartreuse (or chartreuse)
1 1/2 oz of pisang ambon liqueur
2 oz of sparkling bitter lemon soda (or Lemon Soda)
Shake pisang, gin, and chartreuse with half a glassful of broken ice, and pour unstrained into an old-fashioned glass. Add the bitter lemon, and serve.