 In India, this technique is used by street vendors selling shelled peanuts or popcorn cooked in salt heated in an iron wok.Muri, or puffed rice, is also a common snack in India and is one of their oldest foods.The puffed rice is made by heating salt or sand in a karahi or wok over a fire in a traditional Indian stove, then pouring parboiled or dried pre-cooked rice into it and stirring.