Marinated in spiced yoghurt, Kashmiri chillies, and garlic, then roasted over roaring tandoor charcoal embers with charred edges.
Blend the coriander leaves, mint leaves, green chilies, and ginger-garlic paste into a smooth green paste.
Combine the paste with the yogurt, garam masala, lemon juice, and salt; coat the chicken and marinate 3 hours.
Thread the chicken pieces onto skewers.
Grill over hot coals, basting with butter and turning, until charred at the edges and cooked through.
Serve hot with mint chutney and onion rings.