Combine all the dry spices in a tray, spread them out and dry them out completely in a slow oven without burning them.
Pound them using a mortar and pestle to a coarse powder
In a bowl mix the ground spices with vinegar, add the lamb and mix thoroughly to coat well. Set aside for 10 minutes
Heat the grill and cook the chops on a medium heat by searing them for 3-4 minutes each side to get a crisp skin and golden brown colour
Remove from fire and keep warm in an oven dish to rest preserving the juices and keeping it covered
Collect the juices in a pan and reduce with tomato puree, jaggery and add the butter.
Check the seasoning
Boil the potatoes with turmeric and salt until tender
Drain and pass through a fine sieve and mix with the butter
Heat the clarified butter in a thick bottom frying pan, add the mustard seeds and when they begin to crackle, add the ginger and green chillies
Stir in the mashed potatoes; add the mustard paste and cream and sauté till the potatoes leave the side of the pan
Add the coriander leaves, mix well and remove from fire
Divide the mash on to four plates, sit the chops on it and pour the sauce around for pres1entation