Mustard seeds are used as a spice in South Asia. The seeds are usually fried until they pop. The leaves are also stir-fried and eaten as a vegetable. Mustard oil is used for body massage during extreme winters, as it is thought to keep the body warm. In South Asian cuisine mustard oil or shorsher tel is the predominant cooking medium. Mustard seeds are also essential ingredients in spicy fish dishes like jhaal and paturi. A variety of pickles consisting mainly of mangoes, red chili powder, and powdered mustard seed preserved in mustard oil are popular.