Busan has so many variety of food, but the most interesting to me is the street food.
I remember in my childhood, my father was very strict to me for not so often eating kind of street food such as bakso (meatball soup), gulali (kind of sugar flower ^^), bakwan (meatball soup, too, different kind with the first one), tahu tek (Javanese fried tofu), es campur (mixed fruit ice), etc. His reason is understandable because he is afraid that those food are not clean enough and we can't be sure about what are the ingredients.
He is very clear with his rules that the children shall not eat the tomato sauce which always comes together with bakso or bakwan. He said that the tomato sauce wasn't made by healthy ingredients and usually used many food coloring. So, my mother always prepares tomato sauce that we can buy at supermarket.
He also didn't allow us to eat those food using the seller's plate/bowl/spoon/fork. We have to use our own eating utensils. That is why until nowadays, we usually try to take the food away, and eat it at home.
Odeng is flat fish cake on a stick which looks like sate (satay). It was boiled in soup and you can have the soup along with odeng. It is very comfortable to have this kind of meal in winter time because of the hot soup can warm your body.
I didn't really like ddeokbokki in my first bite, but I do like it nowadays, especially the sauce. When I saw the sauce, the memory of my father's rule about tomato sauce blasts on my mind ^^.
I think I will miss this street food if I move from South Korea someday.