3/4 oz of spiced rum
3/4 oz of Light Rum
2 1/4 tsp of Lemon Juice
2 1/4 tsp of Lime Juice
2 1/4 tsp of Orange Juice
1/2 oz of Orgeat (or almond syrup)
2 dash of bitters
1/2 oz of Herbal Liqueur
Shake all but Chartreuse, strain, crushed ice filled lowball glass, add chartreuse to empty lime shell, ignite. Guest pours Chartreuse into cocktail at leisure.