Eugene S. Qahhaar’s Calumet Heights restaurant, which he opened in 1973, mostly offered hot dogs and burgers until he decided to add a breaded whitefish sandwich to the menu to shake things up. A fitting addition to a spot called Dock’s (the name is actually an homage to Qahhaar’s father, Dock Meadows), the dish took off. Many franchises later, the Fishwich remains the menu’s anchor, if you will — and the recipe hasn’t changed a bit. The sandwich features two seasoned, breaded whiting fillets topped with chopped lettuce, tomato, and tartar sauce, all of it wedged into a whole wheat bun. $6.30; 112 W. 87th St., West Chatham