I'm completely guessing here, but its something I've been planning to try. I've read that you can make your own "instant rice" by mostly cooking, then dehydrating the rice. I've been wondering if the same would for for beans. I would assume that IF it works, it would work better with the tougher skinned beans so that they wouldn't mash up too bad.

EDIT: The cook posted that while I was posting this. Looks like my guess was right.