Just like many of the British versions of Indian curries, our lamb rogan josh is quite a lot different to those made in India. Mutton or lamb rogan josh originates from the Kashmir region of India where it is made with tempered whole spices such as cloves, cinnamon, bay leaves, cardamom and deseeded kashmiri dried chillies. Meat on the bone is braised in a sauce that is deep red in colour, both from the kashmiri chillies and roton jot, which is a natural red food colouring and difficult to come by in the West, where the red colouring is achieved with paprika and tomato.