2 1/4 oz black pot still rum (such as Hamilton Jamaican Pot Still Black Rum)
1/4 oz Absinthe
1/2 oz fresh lemon juice
1/2 oz fresh lime juice
3/4 oz Grenadine
1 oz seltzer
Garnish: Pineapple fronds
Add all ingredients except seltzer to drink mixer tin or shaker with crushed ice. Flesh blend or shake until cold and open pour into a double old-fashioned glass. Garnish with pineapple fronds.