Grilled pork on a stick with chilli, lemongrass and fish sauce is a common snack for Hanoians which is easily seen on almost every street in Hanoi. They can be eaten with bread, rice or simply by themselves standing right on the street.
I sometimes drink Bia Hoi at Bia Hoi corner in Ta Hien street and order my pork stick from the lady next door to drink beer with. I occasionally do this on my day off. Her pork meat is good, less fat than other places and she is friendly. Just before serving them, the lady bastes the meat with some more chili sauce. It's the best when it's hot.