If you're in Budapest on a budget and looking for vegetarian food then check out this cheap and cheerful chain of fast-food style restaurants. If you're determined to have meat - they also have branches which serve meat but this one on Hollan Emo U. is veggie only.
It isn't the kind of place where you would go out for dinner - as the decor and menu is more fast-food than anything although I did see some bottles of beer behind the counter.
It would be ideal for breakfast, lunch or a cheap and cheerful dinner on the run.
A delicious and filling falafel, hummous and pitta sandwich costs just 600 forint (about €2). Everything is cooked fresh to order.
Along with excellent food they've good coffee and free wifi.