In a cocktail shaker, muddle the mint with the brown sugar and lime juice. Add the Metaxa, lemon juice and ice. Shake well and strain into an ice-filled highball glass. Top with a splash of the club soda.
Repeat for the next mojito!
Notes
Use less lemon/lime juice if you prefer a sweeter drink.
Metaxa is a special Greek liqueur. I found it at a well-stocked liquor store.