More fun than Fried Green Tomatoes - it's Purple Sweet Potatoes! I first learned about this food on Sunday. Their offical name is the Hawaiian Purple Sweet Potato, and they are known as 'uala in the native language. A purple sweet potato is great in desserts as well as side dishes. They are naturally creamy and sweet and can be prepared like any other potato - fried, mashed, baked, etc. They are very good for you. Rich in antioxidants and fat-free, they are especially good for people with diabetes.