Mustard also called as rai, is an age-old spice with culinary and medicinal uses. Black mustard is often used in cheese and egg dishes, vegetables and pickles. In indian cuisine, it is added in the initial stage of cooking. It is a popular ingredient in salad dressings, sauces and soups. It is used as a table condiment. Black Mustard is useful in bronchitis and a mustard tea is highly effective in fever and cold. It is widely used in dry vegetable curries to add flavour.