Ok, so this is self-explanatory.
What dishes to you immediately associate with a given restaurant?
I'm not talking about what restaurant makes the "best" dish. For example, you might think that Brent's has the "best" pastrami, but most people I think would say "Langer's" if you said, "pastrami sandwich".
And let's exclude one-item specialty joints -- i.e. Pink's (hot dogs) or Father's Office (burgers). That's just too easy.
With that said, here's my preliminary list ... feel free to add, disagree, etc.
Langer's - Pastrami Sandwich
Din Tai Fung - XLB
101 Noodle House - Beef Roll
Lou - Pig Candy
AOC - Bacon wrapped figs
Babita - Shrimp Topolobampo
Tacos Baja Ensenada - Fish tacos
Wood Spoon - Pork Burger
El Cholo - Green corn tamales
Old Country Cafe - Taiwanese pork chop rice
Dong Nguyen - Hainan Chicken Rice
Yang Chow - Slippery Shrimp
Pete's Cafe - Blue Cheese Fries