Cut the vanilla pod in half lengthwise and scrape out the pulp. Caramelise the cane sugar in a pot. Deglaze with juice and simmer for about 10 minutes. Add vanilla pulp, cinnamon, cardamom, pimento and honey and continue to simmer until the honey has dissolved.
Add vodka while stirring and remove from the heat. Pour the still hot liqueur through a fine sieve and pour into clean rinsed bottles. Add 1 scraped-out vanilla pod half to each bottle as a garnish, seal and leave to steep for at least 24 hours.