Mustard is made from the crushed seeds of a family of plants. Some mustard plants are grown for their leaves, which are widely eaten as a vegetable in the East; others for their seedlings, often eaten with cress as a salad or sandwich garnish. Three sorts of seed - black, brown and white - were once used in the manufacture of mustard powder but black seeds are no longer grown commercially. Mustard powder has been used in Britain for centuries, but French-style wholegrain mustard, Dijon, German, American, Australian and flavored mustards have all become popular in recent years.
** Asian Recipes