In Spain, the word tortilla refers to a thin omelet, and in San Sebastián the Best Tortilla is a title that everyone loves to argue about. It is indisputable that one of the city's most delicious is that of Bar Nestor. It's a masterpiece that is very underdone in the middle and gloriously orange.
To sample it, you must arrive at 1pm or at 8pm. Scoot in at 15 after and don't expect there to be any tortilla remaining.