Start by muddleing the half lime and the 3 mint leaves in a large glass, then fill glass with crushed ice, then pour your double ray & nephews over the crushed ice. next put the grenadine and the cherry brandy in with the sugar and stir to finish. Stir hard to mix well.
This ones for the wreck heads out there so be carefull as the Ray & Nephews rum is 63%. Enjoy!