1 cup fresh blueberries, plus extra for garnish
4 oz clear rum
10 fresh mint leaves
2 teaspoons sugar, divided
juice of 2 limes
6 oz club soda
In a food processor or blender, puree blueberries until smooth. Set aside.
Add mint leaves and sugar to a cocktail shaker. Use a muddler (or the end of a wooden spoon) to muddle the mint and sugar. Add the lime juice, club soda, rum and pureed blueberries: shake vigorously.
Pour into two tall glasses, garnish with a lime wedge, extra blueberries and a sprig of mint. Serve immediately.