Carbon bread

Today's very fun activity was flying from Hong Kong to Qingdao, China. During the meal service on my flight, I was offered a bread basket with three types of bread. Before I selected my piece, I noticed that one type was ... black. Like black as night!

I asked the flight attendant what it was and she nicely pointed to each variety for me: "Garlic bread [that one I totally figured out, given the aluminum foil and the butter], tomato casserole [um, not sure about that one, since it looked like a boring roll to me] and carbon bread." I didn't quite understand what the third bread was, so she had to repeat it for me. Carbon bread. Carbon.

I was too taken aback by its appearance to try it, but I'm really curious now. If they offer it to me on the way back, I'll have to give it a go!