Doc, over at Medieval Cookery, has posted an article about how medieval a given "medieval" meal is.
And you can more or less use his three points - medieval ingredients, medieval recipes (or techniques) and menu (kit) consistency.
Speaking of medieval or not-really-medieval stuff, medievalists.net have outdone themselves. They have actually posted an interview (which is more or less really a plug) with a lady making "medieval leather clothing". I am not going to post a link to it - but I will tell you that I watched it, and that I could not decide whether to laugh hysterically or cry into my coffee. Leather garments in the Middle Ages are something that is not easily grasped due to the relatively sparse sources, and most leather finds we have are from shoes. Let's just say that the things shown in that video are not medieval in ingredients, recipes or menu consistency.
Wisely, medievalists.net have closed the interview article to comments.