First make the simply syrup. Put all the ingredients into a medium pot and bring to a boil. Turn the heat down to medium and simmer for at least an hour or until the mixture reduces and starts to thicken up a bit. It doesn't need to be too thick. Set aside to cool.
Salt the rim of your glass and fill the glass with ice or crushed ice.
Pour all the ingredients into a martini shaker and shake well.
Pour into your glasses and enjoy!