1. Begin by making your sugar syrup. Simply add the sugar and water to a saucepan, bring to the boil then turn down and simmer until the sugar has completely dissolved. Set to one side to cool.
This will make more syrup than you need, but you can store the rest in a clean bottle in the fridge to use for future cocktails. It’s easy to adapt the syrup recipe to make as much as you’d like – just as long as it’s made with equal parts sugar to water. If you find that you’d prefer a thicker, sweeter syrup, change the ratio to two parts sugar to one part water.
2. Pare the clementine so you have a long strip of rind – set this aside for the garnish later. Continue peeling the clementine, throwing away the rest of the peel, and then segment the flesh.
3. In a mixing glass, crush the clementine segments, the ginger slices and the cranberries (saving the garnish cranberries for later).
4. Pour over the bitters, the bourbon and 25ml of the sugar syrup. Add ice and stir to chill for five minutes or so.
6. Strain your old fashioned into your drinking glass over fresh ice. Twist the strip of clementine rind from earlier into a bud, then drop into the glass. Skewer three–four cranberries and soak them briefly in the extra syrup. Once most of the syrup has dripped away, roll the cranberries in a bowl of sugar and add to the glass as well.