A while back I went to a Peruvian restaurant where I ate my first purple potato. This weekend I saw some at the grocery and decided to get some. A thing about purple potatoes is that they contain high antioxidants, specifically anthocyanin. It's the same thing that makes blueberries blue. I don't know what that means for your health, but it sounds like good stuff. Regardless of that, they're purple which is reason enough why they are so cool.
Boiled for 14 mins., peeled, mashed, salted, added parsley and drizzled with extra virgin olive oil...very good, taste kinda like yams.