Move over biscuits and gravy, this underrated dish is a fan-favorite. Credit: SOPA Images / Contributor/Getty ImagesCracker Barrel is known for its Southern charm and comfort foods. That means, for many, a trip to the restaurant means ordering the classics: fluffy pancakes, chicken-fried steak, or a plate of Chicken n’ Dumplins. But tucked among the comfort-food staples is a deeply Southern seafood dish that loyal customers insist deserves far m…