I admit, my kosha mangsho comes out good, but not great. In any case, I made some yesterday. It turned out meltingly tender and more than edible but the drawbacks as I see it are – not enough of that clingy gravy and somehow just not that dark rich brown. Good enough, but good enough is not good enough. Kosha Mangsho which to all real Bongs will mean goat mutton (not chicken, and definitely certainly absolutely not lamb) is basically a variant of bhuna ghosht or braised mutton. You cook it slow, and do not add any water. The spicing is fairly standard: bay leaf whole red chillies, as many as you can bear whole bong-style garam masala (relax, its just clove, cinnamon, cardamom and black cardamom in suitably mysterious proportions) ginger, paste or diced dhania, jeera, red chilli, turmeric paste two large potatoes, halved a little jaggery (or sugar) The body of the gravy is from onions (lots of them – I used three medium onions to a kilo of meat...