Wasabi is a root vegetable that is grated into a green paste. Wasabi is a condiment traditionally used to garnish raw fish (sushi and sashimi) and noodle (soba) dishes in Japan. In supermarkets, wasabi is widely available as a paste or in powder form. Wasabi powder has to be mixed with water to become a paste.Wasabi has a strong, hot flavour which dissipates within a few seconds and leaves no burning aftertaste in one's mouth (I don’t like it much).