Marinated in spiced yoghurt, Kashmiri chillies, and garlic, then roasted over roaring tandoor charcoal embers with charred edges.
Whisk the yogurt with ginger-garlic paste, chili powder, turmeric, garam masala, besan, mustard oil, and salt; coat the paneer and vegetables; rest 30 minutes.
Thread the paneer, onion, and pepper alternately onto skewers.
Cook in a 200C oven or on a grill for 15-18 minutes, turning once, until the edges char lightly.
Slide off the skewers and serve with mint chutney and onion rings.