Tender lentils slow-simmered with warming turmeric, finished with a sizzling tarka of golden ghee, roasted cumin, and fresh coriander.
Blend the vinegar, soaked chilies, garlic, cumin, and turmeric into a smooth paste, coat the chicken, and rest 1 hour.
Soak the basmati 30 minutes, then parboil in salted water until 70% done and drain.
Fry the onions in mustard oil, add the marinated chicken, and cook until the paste darkens and the oil separates.
Layer the chicken masala and parboiled rice in a heavy pot, scattering half the fried onions on top.
Seal the pot with foil and lid and cook on low heat 25 minutes; rest 10 minutes before serving.