This is my version or adaption of a wonderful Madhur Jaffrey recipe. Great to share with friends on a cold night. I generally serve with yellow rice, cauliflower with green chillies and ginger, and cumin potatoes. And lots of full-fat yoghurt.
I find that chuck steak is better than blade. If you have the time, prepare the curry earlier and let sit for an hour or two to allow flavours to develop. Then heat up before serving.