Jamie Oliver Lamb Rogan Josh is a slow-cooked Indian-style lamb curry made with onions, tomatoes, garlic, ginger, yoghurt, and aromatic spices. It’s simmered until the lamb turns tender and the sauce develops a deep red colour typical of traditional Rogan Josh.
Heat the oil in a large pot and brown the lamb on all sides. Remove and set aside.
Add more oil if needed and cook the onions until golden and soft.
Add garlic, ginger, cumin, coriander, paprika, turmeric, chilli powder, cinnamon stick, and cardamom. Cook for 30 seconds to release aroma.
Add tomato purée and cook for 1–2 minutes to deepen the flavour.
Stir in the chopped tomatoes. Add yogurt gradually while stirring so it doesn’t split.
Place the browned lamb back in and mix well.
Pour in stock, season with salt and pepper, cover, and simmer for 1½–2 hours until the lamb is completely tender.
Stir in garam masala at the end. Garnish with fresh coriander. Serve hot.
Find it online: https://jamieolivereats.uk/lamb-rogan-josh/