Wasabi — that bright green, spicy paste served with sushi — is more than just a condiment. True wasabi comes from the rhizome ...

Pretend you're at a sushi restaurant and make these economically savvy towers of tuna, rice, avocado, and wasabi-spiked shishito peppers at home.

As for the wasabi, the recipe called for a powdered variety. Fieri then makes a paste by mixing the powder with water. My local grocery store didn't have wasabi powder in stock, but I found wasabi ...