This little bar across the street from the Mezquita serves what is claimed to be the world’s biggest tortilla de patatas (30 eggs and 5 kg of potatoes). I'm not arguing. It’s damn good. Thick wedges are deftly cut from giant wheels of the stuff and customarily served with plastic forks on paper plates to eat outside under the Mezquita's walls. And while you may have come for the monster tortilla de patatas, stay for a bowl of salmorejo and some of the other home-style tapas offered. It’s a tiny spot with just two small tables (a low one in front of the window, another tall one in the corner) so it’s mostly standing-room-only at the bar. Most people prefer to take their tapas and drinks outside and sit along the low stone Cathedral wall in front of the bar.