It has a sharp, hot flavor which dissipates within a few seconds and leaves no burning aftertaste in one's mouth. Wasabi is the traditional complement to sushi and sashimi, as well as other Japanese noodle dishes.brTo prepare Wasabi Paste/SaucebrMix 1 tsp. wasabi powder with 2 tsp. warm water stirring until it forms a smooth paste. Cover and allow the paste to rest for 10 minute to release its fiery qualities. May Add 3 Tablespoons mayonnaise to this wasabi sauce to make Wasabi mayo sauce, refrigerate.br.