In a bowl add the greek yoghurt then add the Lamb shanks and thoroughly marinate the lamb in the yoghurt - ideally overnight but at least an hour
Step 2
In a grinder make a paste of the garlic and ginger then add the red onions and blitz and set aside
Step 3
Heat the veg oil till a haze forms then add the bayleaves, then the mace, cinnamon stick, cardamon pods, star anise and cloves and fry for a minute
Step 4
Now add the garlic/ginger and red onion paste to the pan and stir
Step 5
Then in a bowl add the dried spices which are chilli power, ground coriander, turmeric and garam masala now add some warm (not hot) water to blend all the spices together to make a small paste then add to the pan and stir in
Step 6
Now add the lamb shanks for the pan and add water
Step 7
Add the cashew nut paste and the pureed tomatoes (passata)
Blitz the shallots, garlic and green chilli and sliced ginger so you get a nice paste and set aside
Step 2
With a little oil, dry the mustard seeds until they "pop", with the cumin, cloves, crushed cinnamon and cardamom pods
Step 3
Fry the pork in the spices and add the paste and stir in
Step 4
Add lots of water (cant be precise say about 1 pint? or more)and bring to a simmer for about 45mins
Step 5
About 5 mins before it is due to be served, add the tamarind paste which you have watered down and the crushed coriander seeds, stir in and bring to the boil
Step 6
Serve with either rice or crusty bread - as a finishing touch you could add chopped coriander as a dressing on top