The world's best Spanish omelette?

Your average tortilla Espanola is tasty at best. Perhaps very tasty. But hardly ever mouth-wateringly good.

However, exquisite excellence is exactly what Juana La Loca (Plaza Puerta de Moros 4, Madrid) managed to achieve. Transformation of the understated trio of egg, onion and potato into a stellar dish. Perfectly cooked, perfectly sized divisions of potato lie peacefully in the secret of the dish, an undescribably unctuous onion reduction whose intense caramelised onion appeal is sweet and goey; not overpowering yet somehow addictive. And when finished off with expertly cooked light egg casing, all I can say is well done Juana La loca, well done.