juice the lemon, put the juice of the lemon in a shaker with ice, make your simple syrup with Sugar in the Raw, put that into the shaker, put the Dark Rum (darker the better, Goslings Black Seal is good, Bacardi Select is good, anything very dark...) in the shaker. Shake for a bit, put it into shot glasses (sugar-in-the-raw-rimmed if you're putting that much effort into a shot), and you're set...