A fresh summer version of the famous Cuban cocktail. This is an alcohol-free version, but you can satisfy all tastes by adding a soupçon of vodka.
Place the mint leaves and diced lime in a tumbler. Muddle gently to avoid damaging the mint. Fill the glass with crushed ice, and pour in the syrup and juice. Stir and top up with more ice. Garnish with a slice of watermelon and a mint sprig.
Alcohol abuse is bad for your health, please consume in moderation.