Marinated in spiced yoghurt, Kashmiri chillies, and garlic, then roasted over roaring tandoor charcoal embers with charred edges.
Hollow each boiled potato slightly with a melon baller.
Coat in yogurt, ginger-garlic paste, tandoori masala, turmeric, amchur, and salt; rest 30 minutes.
Thread the potatoes onto skewers.
Grill over medium-high heat, basting with mustard oil.
Cook until the skins blister and smoky spots appear.
Dust with chaat masala and serve hot.