Posted: 26/03/2015 at 07:11
A friend on a cookery forum has this suddenly appeared in a plant pot used for tomatoes last year. It is 4-6 inches across and she says it 'has no height to it'.
My best thought is that it's a bit like radicchio but she can't think where it's come from. She grew some mixed salad leaves a few years ago, but not in that pot.
Anyone got any better ideas?