50ml white rum

2 tsp brown sugar

1/2 fresh lime

4 mint sprigs

Soda water

Crushed ice

Highball glass

Cut lime into quarters and put two in the glass. Add sugar and mint then muddle together, squeezing the juice from the limes. Fill with crushed ice, top with rum and stir briefly to lift the mint and lie from the bottom of the glass. Garnish with mint and lime