Budapest has a great amount of restaurants providing locals with daily lunch menus. Menza is one of the best in this field. Their food is hearty and decadent, ther a la carte is exiting, bith international and local. As for the service - top notch. I worked in restaurants and bars and am picky about it. They are very personal, no pretense at all.
To make sure no one rips you off at a square where it is more than a custom. And because of the great food.
If you ask for a table INSIDE during lunch hours (typically between 11.30-14.00), you can get it quicker. Until that they seat you at the bar w snacks
Mon-Su: 10:00-00:00