1 oz Fernet Branca1 oz sweet vermouth1 oz ginger liqueur1 oz lime juice1 oz ginger beer
instructions :

Combine the Fernet Branca, sweet vermouth, ginger liqueur and lime juice in an ice-filled shaker.
Shake well and strain into an ice-filled Collins glass.
Top with ginger beer and garnish.

source :
imbibemagazine.com