Finely chop the base of each stick of lemon grass and divide between two tall glasses. Split the sugar and mint leaves between them, then crush with a muddler or the end of a rolling pin to release all the flavours. Add the lime wedges, bash up the mixture a little more, then pour 50ml of rum into each one. Fill the glasses with crushed ice and top up with soda.
ingredients
• 2 sticks of lemon grass
• 4 tablespoons light brown sugar
• 6 sprigs of fresh mint, leaves picked
• 2 limes, cut into wedges
• 100ml good-quality rum
• a large handful of crushed ice, to serve
• soda water, to serve