Mustard, also called mustard seed, western yam, mustard powder, generally green mustard and yellow mustard. Yellow mustard comes from China and is made from the seeds of mustard. Green mustard (green mustard) originated in Europe, is made with horseradish (radish) and is green after adding pigment. Its pungent smell is stronger than yellow mustard, and it has a unique aroma. Mustard slightly bitter, spicy, and has strong stimulation to the breath, the taste is unique, mustard powder after wetting fragrance overflowing, strong excitant spiced with tear, to taste, smell all have stimulative effect. It can be used as a pickle, pickled raw meat or salad dressing. It can also be used with raw soy sauce to serve as a delicious seasoning for sashimi.
Japan's wasabi is actually made from horseradish. Most Japanese restaurants use mustard or horseradish instead, thanks to the high price tag and the difficulty of preserving horseradish.