One of the best burgers I know was the vegetarian portobello burger with blue cheese at the Burger Bar in Amsterdam. € 5.25 a couple of years ago (I don't think

One of the best burgers I know was the vegetarian portobello burger with blue cheese at the Burger Bar in Amsterdam. € 5.25 a couple of years ago (I don't think they have it anymore). Quality was sadly variable, but when they get it just right, the taste combo was absolutely divine.