1 oz of Jamaican rum (or Gold Rum)
1 oz of ginger liqueur
1/2 oz of Lime Juice
1/4 oz of simple syrup
8 drop of bitters
2 oz of soda water
Shake. Strain to rocksglass over fresh ice. Top with soda. Garnish with lime spiral and be sure to express some of the oils over the top of the glass.