Thai pancake. Sold in little carts on the street. When you order one, they'll take a little lump of dough from a pot (the dough is made from eggs, flour and butter) and stretch and flatten it out until it's very thin. It's cooked on a hotplate and folded around whatever filling you choose.
This is banana and peanut butter. I also had a cheese & nutella. It was as horrible as it sounds but if it's listed as one of the options it's probably rude not to give it a try, right?