Marinated in spiced yoghurt, Kashmiri chillies, and garlic, then roasted over roaring tandoor charcoal embers with charred edges.
Hollow out the parboiled potatoes with a melon baller, keeping the shells intact.
Mix the paneer, cashews, half the ginger-garlic paste, and a pinch of salt; stuff the mixture into the potato shells.
Coat the potatoes in yogurt mixed with Kashmiri chili powder, garam masala, remaining ginger-garlic paste, and mustard oil; rest 30 minutes.
Skewer the potatoes and grill over hot coals, turning often, until the skins char and the potatoes are tender.
Brush with melted butter and serve hot with mint chutney.