Resist the urge to pile on any of the usual toppings—lettuce, tomato, ketchup. "The port is your condiment," explains Umami Burger's Adam Fleischman.Tip: Burger purists handle ground meat as little as possible; over-working the beef can create a tight, meatloaf texture. Slideshow:More Great Burgers
The Secret Seasoning To make simplified umami dust, use a spice grinder to pulse 3 tablespoons bonito flakes, 1/2 ounce crumbled dried kombu, and 1/2 ounce dried shitake mushrooms into a powder. Umami dust will soon be available at umamiburger.com.