My friend Edgar had already warned me that visiting the Los Coloniales tavern was mandatory when in Seville.
We were there this weekend and, really, it is an ideal place for lunch or dinner if you're in the centre of the city as it is very close to the cathedral.
It is advisable to arrive early if you do not want to queue. We arrived at 13:00 and were seated immediately (and there were more than ten of us...), but when we left there were queues to get a table.
We tried the patatas bravas (fried diced potatoes with warm spicy tomato sauce), the chicken with almond sauce, the rice of the day, and "tablas rocieras," one of their flagship dishes.