Cranberries are easy, if you have a cranberry bog nearby. Otherwise you hope you have someone who does have them to bring them to market. I love the idea of brandied cranberries (or cranberry brandy), yum.
http://www.guntheranderson.com/liqueurs/cranberr.htm "Following is a complete how-to for my favorite recipe, Cranberry Liqueur. It covers in detail a number of issues which are taken for granted in other recipes here. It's probably a good introduction to read through before starting one of your own."
History of the hamburger: "But before we even start talking about cheese we must trace the history of the plain old Hamburger. This story goes as far back as the 11th Century when the Mongols carried flat patties of meat with them on long horseback trips. These Mongols would travel to Moscow and the idea of a flat patty of meat spread through the city and was eventually brought to Hamburg in Germany by sailers. From here it spread to New York and the meat patty became known as a Hamburg Steak or Hamburger"