General Information
Wasabi root is the long, knobby tuber of a branchless plant that produces single-stem, rounded leaves. A mature wasabi root is firm, cylindrical, brown and green-skinned and tapered. It resembles a stalk of Brussel Sprouts after the sprouts have been removed. The leaves and stems are edible, and the entire plant is used in both food and health applications. It should be about six inches long and two inches in diameter when harvested. Its pale, lime green flesh appears somewhat dry and emits a little aroma. However, once grated it reveals a creamy, moist consistency with a fiery, mustard-like flavor and pungent fragrance. Of the two types of Wasabi, the aquatic “sawa” Wasabi has an intense flavor that lingers just a short while, leaving a slightly sweet after-taste. “Oka” Wasabi has a less intense taste and the flavor lingers a bit longer. The compounds responsible for the intense flavors found in Wasabi are the same that make it valued as a health food.
History
Wasabi root is native to the wet banks of Japan’s mountain streams. In the United States, Wasabi root is grown in the rainforest-like areas of Oregon, Washington, and British Columbia. Wasabi grows best in a humid and damp, temperate environment. It can take up to three years to cultivate a Wasabi plant. The nutrients and flavor are concentrated in the rhizome, so the longer it remains in the ground, the more potent the flavor and beneficial the nutrients. The ideal time-frame for optimal size and flavor is around 24 months.
