On my recipe blog, I had a Navy friend ask me if I had this recipe, and I did, don't know why I added it really, just for some fun really. For anyone that has been in Seoul, South Korea, in the bar districts when the Navy visited, there was a street vendor with a cart, they made and sold Ham-O, Egg-O, Cheese-O (sandwiches). This is a basic sandwich, and they made bank with these! Koreans, much like the Japanese, add an Oh sound at the end of western words. These were made when you ordered, wrapped in paper and placed in a bag. These were $1 each.