Do purple potatoes taste different than white or yellow varieties? Hard to say, according to Chowhounds, but all agree that the purple spuds are very attractive.
HillJ slices them lengthwise and tosses them with olive oil, balsamic vinegar, dried thyme and rosemary, grated garlic, and sliced onion, then roasts for 90 minutes at 375ºF. "Super easy, very delicious," she says. cheesecake17 treats them similarly, but adds whole garlic cloves instead of onions.
Discuss: Tips for Purple Potatoes