I never saw one; but this weekend I had a surprise. At the farmer's market in Cold Spring, I bought a gorgeous looking, bright purple cauliflower. I expected that when cooked it would turn green like almost all the purple vegetables I have cooked with, or brown like eggplant. Much to my surprise and partial failure, when I microwaved some of the cauliflower it stayed purple. My failure was in over cooking it as I thought that it would turn green. In the future I'll know better and enjoy my purple cowliflower for itself.