Cook's Pantry Organic Whole Grain Dijon Mustard is prepared, packaged, and imported from the Dijon region of France long renowned for its superior mustard. The origin of the word "mustard" comes from two Latin words, mustum ardens, which means "burning must" because in ancient times mustard was prepared with unfermented grape juice. This word then gave rise to the word "mustard" in English. Mustard plants are close relatives to broccoli, cauliflower, turnips, and cabbage. All parts of the mustard plant are edible: The leaves of the plant, known as mustard greens, are delicious in salads when they are young and tender.