A pork vindaloo is a classic example of fusion food, dating way before trendy restaurants started to do it. It is an Indo-Portuguese recipe dating from around the 15th century and clearly demonstrates that pork can be the centre of a curry!
Pour the boiling water over the tamarind, then mash it a little before leaving it to steep for 10 minutes whilst you prepare the remaining ingredients for the marinade.Give the tamarind a final mash, then push it through a fine-mesh sieve.
Peel then roughly chop the onion, then add it to the blender.
Peel the ginger and garlic and place them in a blender.
Add the rest of the ingredients for the marinade (including the tamarind) to the blender and blitz to a paste.
Add the pork cubes and blended marinade to a mixing bowl, mix, cover and place in the fridge for at least an hour and up to 24 hours.
When you are ready to cook, top and tail, peel, and cut the onion for the curry into 6 wedges.
Heat a 20cm or 8" saucepan that can be placed in the oven over a medium-high heat.
Melt the ghee in the pan and add the onion wedges and cook for 5-7 minutes until they begin to colour.
Roughly chop the tomato.
Cut the green chillies in half lengthways.
Add the powdered spices and fennel seeds to the pan and stir for 30-60 seconds.
Throw in the tomatoes, slit green chillies, salt, pepper and cardamom pods and stir.
Finally, add the pork, the marinade and 75ml (⅓ Cup) of water, then stir everything together.
Add a lid and then place in the oven and cook at 160°C or 320°F for 2 hours.
If you like a drier curry with less sauce, remove the lid for the last 20-30 minutes of the cooking time.