Pour the coconut milk and coconut cream into a deep pan and bring to the boil. Reduce the heat to a simmer, add the duck joints and simmer for about 10 minutes (if the mixture looks too thick and oily, add some water).
Skim off about 1 tablespoon of the coconut oil that has formed and heat it in a wok or heavy-based frying pan. Fry the curry paste in this oil for