Preparation

• Wet the rim of a cocktail glass in a little water and then dip the rim into a small dish containing the sugar. Place the glass in the freezer until ready to use.
• Fill a cocktail shaker with ice and add the rum, lime and grapefruit juices, and maraschino liqueur. Put the lid on the shaker, making sure it has a good seal. Shake vigorously until frothy, at least 30 seconds. Strain into the prepared glass. Garnish with the cherry and zest.