A pungent, tangy North Indian specialty infused with robust pickling spices, mustard seeds, fenugreek, nigella seeds, and fresh green chillies.
Mix the chicken with the yogurt, ginger-garlic paste, red chili powder, and salt; rest for 30 minutes.
Heat the mustard oil until it just smokes, then splutter the mustard, fennel, nigella, and fenugreek seeds.
Add the marinated chicken and sear on high heat for 5 minutes.
Lower the heat, cover, and simmer until the chicken is tender and the gravy thickens, about 20 minutes.
Bhunao on high heat until the oil separates at the edges and serve hot with roti or rice.