Food history is actually fairly interesting when you get into it, because it tells you about as much about a people's geographic history and cultural values as does more "conventional" history (like looking at maps and charts and stuff). And, if you're brave, you can try re-creating various recipes of older food items.
I think there's a few Modern Marvels or How It's Made/How Do They Do It (is there really a reason for there to be two different shows? it's the same thing.) documentaries on the topic that you could probably dig up with relative ease. And of course books and more scholarly stuff.
What is a "Reddiotrs" ?