Wasabi Powder
Wasabi is a variety of green horseradish grown only in Japan; and the only place you will find it fresh. Wasabi powder has a sharp flavor that's a bit hotter than the familiar white horseradish
Combine equal parts of wasabi powder and warm water to make wasabi paste, similar to the familiar sushi accompaniment. You can also make an easy wasabi cream sauce in the same manner, just add warm cream until you reach the desired consistency.