Once a term used only for greasy little hamburgers, slider has come to mean just about any itty-bitty sandwich on a downsized burger bun. At The Cove in Crisfield, Maryland, you can get a triple-slider plate that includes a fried crab cake, a cheeseburger, and a broiled crab cake. The last is the best of the lot – extraordinarily creamy – but there is undeniable pleasure in crunching through the crust of the fried one. The burger is fine, but as the image on Crisfield’s water tower suggests, crab is what’s for dinner in this town.