In Medieval times food was more then just something you did to live, it was a source of entertainment.  Many banquets were held by the nobility, probably as a sign of wealth and position in society.  There were usually at least three courses of foods, mainly made up of meats such as pork or beef, mutton, venison, poultry and fish.  The second course was made up of cheeses, nuts, fruits ,and vegetables like cabbage, garlic and onions. The last course was ale, cider and wine. The rich like to have cakes and other baked goods. The poor people had to live on dark breads, porridge (cereal), fish, pork, rabbit and cheese curd, along with some beer or ale.  Here is a link that gives you more details about medieval foods. http://www.claymoreslinger.com/medieval_food.asp