If you are looking for a suitable medieval recipe for the Faversham Food Festival we have identified a number of websites.
We also have some books on medieval cooking if you fail to find what you are looking for on the web.
English Recipes
Feast & Lunch Menus
Appetizers
Recipes for a medieval banquet
Sweets throughout Middle Age Europe
Medieval Finger and Camping Foods
http://medievalcookery.com/recipes/
http://www.greneboke.com/
http://www.medieval-recipes.com/
http://www.godecookery.com/mtrans/mtrans.htm
http://www.oldcook.com/en/cooking-recipes_medieval
http://www.medievalcuisine.com/Euriol/my-recipes/recipes-by-region/english-recipes