You guys are the best! Thanks so much for all of you who cleared away the cobwebs of my ignorance about bok choi. We didn't actually get to make it this time around - by the time I got the post up, it had already wilted. But next time! Anyway, now that I've revealed exactly how little I know, I'm feeling pretty shameless about revealing more of my uninformed self. To wit: what are these? What can I do with them?