3/4 oz of dry vermouth
3/4 oz of Bombay Sapphire gin (or Gin)
1 dash of Angostura bitters
1 1/2 oz of tuaca citrus liqueur (or orange liqueur)
Shake and strain into a chilled cocktail glass. Twist a slice of lemon rind above the drink and rub along the rim, but do not drop into the drink.