Wasabi comes from the "mountain hollyhock" plant which only grows by cold mountain streams in Japan. Although it's not related to Western horseradish, it is an edible root with a strong aroma and a biting taste. It's generally served as a paste with sushi or sashimi. To make a paste, add equal amounts of wasabi powder and tepid water. Mix well and let stand for at least 10 minutes for the flavor to develop. Mix the paste with soy dipping sauce and add as a condiment with your meal. Wasabi's light green color pleases the eye and its taste stimulates the palate. It's ideal for hors d'oeuvres and Japanese cuisine. You can buy Wasabi Powder on eBay, Amazon.com or other online health food stores.