This is called Madártej. Look that up on google translate or something. Its actually two words: Madár, the accent is really important, and Tej. I'm not quite sure how they get it, but its super good. Probably the best thing Ive drank since Ive been here.
This might look like just a roll with cheese on it. It is. Its also super duper amazing.
This is basically the exact same thing but bigger and with bacon on it. I didn't really know that when I bought it, but really, who could be mad about it?