In early 2013 a Latin manuscript was discovered that contains some fascinating early medieval recipes. The manuscript dates from 1140 from the Durham Cathedral monastery in the UK. The recipes are primarily medicinal in their variety, with the intent to heal the sick and infirm. These recipes are nearly 150 years older than other known medieval era recipes.
I wish I could find a bit more information but it doesn't seem that any individual recipe translations have yet been published. The researchers are apparently working on a book that will be titled "Zinzibar" which is the Latin word for ginger.
The sauces feature simple herbs, parsley, sage, pepper, garlic, mustard and coriander. What I find interesting is that in just a few hundred years, the flavors and types of herbs used in recipes changed a great deal. By the time of the Renaissance they became spicier and more pronounced. Additionally, many of the spices were costly and being able to use a great variety of spices in dishes became a sign of wealth.
One of the recipes apparently translates to: For "hen in winter": heat garlic, pepper and sage with water. Historian David Walbert explains how this simple recipe was meant to help restore balance in the body. He gives a great, succinct explanation of the humors and explains:
What about hen in winter, then? Nicholas Culpeper, whose herbal was the most popular reference on the subject in seventeenth and eighteenth-century England and Anglo-America, considered garlic to be warming and drying in the fourth degree (very much so, in other words), and sage hot and dry in the second or third degree. Culpeper wrote a few hundred years after the cookbook in question, but the theories didn’t change much. Preparing chicken with lots of sage and garlic would thus have dried up phlegm and prevented nasty winter colds. See? It all makes perfect sense.
For a fascinating look at humour theory, check out Eating Right in the Renaissance by Ken Alba. And if you want to try your hand at cooking some recipes from a little later in the medieval era, try Maggie Cook's The Medieval Cookbook.