For the mojito, place the sugar in a tall cocktail glass and cover with the freshly squeezed lime juice. Add the mint. Rub well with a pestle and mash the mint vigorously. If you notice a wonderful mint scent, you have done the job well and released the mint aromas in the cocktail.Pour the Havana Club and add the ice.Fill the glass with soda and stir everything well again.
Decorate with a sprig of mint and serve.