Line a loaf pan (20 x 25 cm) with baking paper.
Scrape out the pulp of a vanilla pod.
Put all the ingredients (including the scraped vanilla bean), except for the chocolate, in a saucepan and bring to the boil. Reduce the temperature and simmer for 10-12 minutes.
Remove the pot from the heat and stir in the chocolate.
Empty the mixture into the loaf pan and let cool for a couple of hours. (Overnight in the refrigerator is best).
Portion into pieces and wrap the candies in baking paper.