These days, when food is often as much about presentation and wow factor as anything else, unusual potatoes like this Blue Congo are increasingly coming to the fore. With it's striking blue skin and surprisingly even darker blue flesh this one is almost violet, but certainly not a shrinking one! Sure to cause comment and controversy at the dining table, it produces decent sized even tubers which roast chip and wedge very well indeed. Be bold and experiment with a taster pack of 10 tubers.