Who was it going on about Blue/black potatoes the other day? I thought StEvil, but can't see the message.
I had some the other day, peculiar things. Not like your purple carrots, or purple podded peas that go to a "normal" colour when cooked (orange and green). These tates stay a bluey-purpley-black colour, all the way through, and retain the colour on the plate. Taste like potatoes, but don't look like them.. Came from Norway, where they're suposed to grow best in the long cool summer days..