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Grating and Preparing Authentic Fresh Wasabi Rhizome

Authentic Wasabi - Fresh Rhizomes

Fresh wasabi is a rare and expensive delicacy that deserves proper handling. Like any vegetable, wasabi is at its best when served as close to harvest time as possible, but since the vast majority of wasabi is grown in Asia, gourmands lucky enough to get their hands on true fresh wasabi know to consume it timely.  If necessary, wasabi rhizomes can be kept in a refrigerator for up to 30 days or so.  For best results the cleaned rhizome should be wrapped in damp paper towels and stored in the crisper drawer of the refrigerator.

Grating Fresh WasabiIt is the process of grating and preparation before serving that optimizes wasabi's unique pungent flavor. Traditionally, the fresh wasabi rhizome is washed, the top end is cut off and it is then pressed tightly against an "Oroshi" grater, a piece of sharkskin mounted on a wooden or ceramic paddle. Using a tight circular motion, the rhizome is carefully grated to produce a small pile of mashed plant particles. While the traditional oroshi is considered ideal, a small toothed or nubbed stainless steel or ceramic grater may be used, the finer the better.  Some chefs also use the back of a knife to further crush the wasabi particles to maximize the release of flavors.

The purpose of grating is to break open the cells of the plant so that the chemical compounds contained within can intermingle and transmute. Technically, it is the exposure of wasabi's glucosinolates with the enzyme myrosinase that releases isothiocynates, the active compounds that produce wasabi's unique taste and are also nutritionally beneficial.

When a suitable amount of wasabi has been grated, gather and press it by hand into a small ball and let it relax at room temperature so that the chemical process can take place. Like a fine old wine, the grated wasabi needs some time to breathe, but no too much time, to maximize its flavor. The compounds released are quite volatile and the flavor will dissipate with too much exposure to air.

Timing is important. Generally about ten minutes after preparation is the optimum time to serve the prepared Real authentic Wasabi™ paste.  Be advised however, the flavor will "peak" after about twenty to thirty minutes. If this occurs and the meal is still ongoing, you can re-invigorate the flavors by vigorously re-mixing it and again regrouping it back into a tight little pile.  Some chefs suggest adding a pinch of sugar to re-ignite the enzyme reactions.  Adding some freshly grated wasabi will also help it gain a second wind.