Bar El Sella
This old-time cantina a block from the eastern edge of Roma opened in 1950 and continues to attract crowds of both locals and tourists-in-the-know. There's nothing fancy about the brightly lit dining room, but the authentic Spanish food is up there with the best in the city and includes slow-cooked octopus, chorizo with cabrales cheese, Spanish omelets with asparagus, and chamorro (a fall-off-the-bone pork shank braised in a heady achiote sauce).