This is the same recipe as Mutton Kosha but with  slight variations. When I made it last for 15 people, I was at it for 2.5 to 3 hours. Really, chicken, that long. Well if you have in mind the texture and color of the chicken, how oil has separated and the richness of the base spices you got to wait. Don’t rush it thinking chicken cooks fast. Of course it does, but for this dish you gotta keep going