From the Zingerman’s website: “While langós is almost unknown over here, in Hungary it’s almost everywhere. There are langós stands all over the country, the same way that hot dog carts cover Manhattan, or falafel stands are all over the Middle East.
Langós is quite simply a flat disc of deep-fried bread dough. Most langós are brushed, right out of the fryer, with a wisp of garlic-flavored water, and then topped with chopped ham, sour cream, and a touch of chopped dill.
Like most fritters, it’s far better eaten just a few minutes after it’s emerged from the fryer. Come in to the Bakeshop on Tuesdays for lunch and get ‘em while they’re hot!”
Zingerman’s, in Ann Arbor, MI has a whole assortment of Hungarian breads and pastries, which you can read about here. Even if you’re not in the area, it makes for interesting reading.
If travel is more your speed, they also have a Hungarian food tour that will head there in October 2013.
For additional information on langós, there’s a bit more on Wikipedia.