Method
For the cocktail
Add all ingredients into a shaker filled with ice.
Shake well, then strain the drink into a glass, ideally over ice.
Garnish with a wedge of lime and a sprinkle of cinnamon if desired.
For the syrup
Add all ingredients to a saucepan and simmer for 25-30 minutes until syrup is thick and all sugar is dissolved.
Store in air right container in the refrigerator for 1-2 weeks.