Wasabi is a common ingredient in sushi. The spicy flavor partners well with both vegetables and fish, making it an ideal condiment for this style of food. However, there are a few things that you should keep in mind. Wasabi in sushi should be used with caution. While the green paste is ideal for use in nigiri between the fish and sushi rice, it must be used carefully, as the potent flavor runs risk of overpowering the subtle flavors of the fish and rice.
One of the most common errors of someone new to making sushi is the overuse of wasabi in their sushi. Every bit of wasabi used should be done so sparingly, so that it acts as an accent to the flavors of the sushi rather than the main focus. If you are eating in a sushi restaurant, sushi chefs are known to become angry if you add too much wasabi to your soy sauce, as this effectively masks the flavors the sushi chef was attempting to create.
Traditionally, wasabi is used in sushi in two different ways. It is either used as an ingredient in the sushi, or it is added to the soy sauce. Wasabi is always provided, regardless of whether it is for take out or for eating in a restaurant. However, wasabi should not be added to the top of your sushi as a topping. This is considered against the traditional rules of wasabi use in sushi. If you wish to add the flavor of wasabi to a dish it is not present in, you should carefully mix the wasabi with your soy sauce in the container provided. Every sushi set will come with a special, shallow dish designed for soy sauce and wasabi.
Another common error made by those new to eating sushi is taking too much soy sauce. When you are eating take out sushi or eating at a restaurant, you should only put a small amount of soy sauce in your dish. It is considered rude to waste the soy sauce and wasabi. However, if you find yourself running out of soy sauce, it is perfectly acceptable to take another serving of soy sauce and wasabi for your sushi.
When you are selecting your wasabi for your sushi, you should only use premium wasabi. As sushi is focused on high quality ingredients for the best possible flavor, this should apply to your condiments as well.