Very interesting that archaeology of the hamburger, @princessmewmew. I hadn't read about it, but obviously I assumed that its name had something to do with Hamburg. From its origin it was marked for fast food (if not Mongolian horses!), as it still is. It is a food that delights especially children and young people, and more than one adult is also devoted to it. It is very versatile, as you say, as it accepts almost any ingredient or combination. Although I've never been much of a eater for her, I know that her taste of combined flavors is seductive and very pleasant. Thank you for your appetizing post. Greetings.