"Tortilla española may seem overrated to some, but for locals, it’s quite the comfort food. It is offered everywhere in the city, but only a few bars and restaurants serve the potato omelet fresh and cooked to perfection. For that, head to Casa Dani, a family-owned bar and restaurant that makes more than 200 a day. Best known as tortilla de patatas, the version here is beloved for its well-done exterior and gooey interior. At lunchtime, the place gets packed, so go around 11 a.m. to enjoy a slice with a café con leche without having to fight for a seat. While there, also give the callos a la Madrileña (Madrid-style veal tripe) a try." - Paula Móvil