Marinated in spiced yoghurt, Kashmiri chillies, and garlic, then roasted over roaring tandoor charcoal embers with charred edges.
Boil the baby potatoes until just tender; drain and keep whole if small.
Coat cauliflower and potatoes in a mix of yogurt, tandoori masala, Kashmiri chili powder, ginger-garlic paste, mustard oil, and salt; rest 30 minutes.
Thread cauliflower and potatoes onto skewers or spread on a grill tray.
Cook over high heat, basting with oil and turning, until the edges char and the vegetables are tender.
Sprinkle with chaat masala and serve with mint chutney and lemon wedges.