Brunswick Food Market
I didn't think I was going to find authentic Hungarian food in London. Several people had warned me that the Gay Hussar, once considered one of the greatest Hungarian restaurants in the world, was utterly cack. London's other Hungarian eatery, Louis Hungarian Patisserie, is a) Polish, and b) closed until further notice, which is enough to rule it out.
The food market at Brunswick Place was a pleasant surprise. Toldi is the stall with a bogrács (cauldron) hanging from a tripod, full of brown splattered stuff. It's goulash, and it's awfully good. It was served it on tarhonya, a chunky egg pasta, and with a helping of salad. It was really tasty.
I asked the owner what the key to a good goulash is. "It's a closely-held secret," he told me, before conceding that "it's all down to the paprika". So now we know.