hi emin-j
the chef at the mouchak uses the oil from the top of the gravy only because it is there, but 1 minute before the end of cooking the dish he adds about 1tsp of melted butter ghee this gives the dish an extra lift imho. i do it and when i asked why he sad the british love their buuter so a little is added to most of the dishes. their curries are fab. and they have 3 other restaurants mouchak is the smallest, the raja of kent which i drive past to get to mouchak and is always packed! the raja of maidstone and they have 1 in dartford that seats 200 people! so they know there stuff.
regards for 2nite
gary