Kürtös Ételbár is interesting; it’s a tiny little hole-in-the-wall take-out joint (they do, however, have a handful of tables if you want to eat in the restaurant). It also just happens to be connected to (and share a kitchen with) Rosenstein Vendéglő, a much fancier, acclaimed restaurant that serves traditional Hungarian fare.
Which means you can get an affordable lunch from a kitchen that really knows their stuff. It’s a great deal.