Piperade serves authentic food from the Basque country in a cosy cave-like setting, one of the cosiest spots in San Francisco. Wood beams in the ceiling, chipper lamps, bold art, a brightly lit bar, and wood floors warm the place up. The feel is European, like a secret find in a Spanish village. Seasonal Basque classics change each day and include braised oxtail with cornichon and Atlantic cod with potatoes riojanas and chorizo. To start, try the warm piquillo peppers with goat cheese, raisins, and muscatel vinaigrette. The evening brings a mixed crowd, from bridge-and-tunnel married folk to young couples and executives doing dinner.