Umami Burger. Heard of it? Yeah, you have. Because its burgers are out of this world! Adam Fleischman has taken the original concept, building burgers based on the taste of Umami to the Nth degree, and created Umamicatessen, what a modern deli should be. You can still get great burgers but you can start off with Pig IN a Can or try out the Hoof and Mouth Sandwich.