We found them in the little organic market where we got the Chestal cough syrup. They all looked pretty old and neglected, and some were well into the process of growing legs long enough to walk away. We picked out three of the youngest looking ones. Apparently purple potatoes taste just like regular white potatoes, but have more antioxidants and are therefore healthier. I ask you, why aren't these more common? Probably because they're purple. Whatever.
We had purple mashed potatoes with pink salt. It felt like a Dr. Seuss kind of evening.