I got this in my weekly CSA delivery and usually the farmer is great about listing everything in the delivery but she didn't send the list this time out. Who can tell me what this is, and there are bonus Internet Points if you have suggestions for what to do with it!
The closest thing I can think of is that it tastes like gai lan (Chinese broccoli). Normally you'd blanch it for a minute or two, then drizzle with hoisin sauce. You could probably also treat it like broccoli and sautee with garlic.