Sweet potatoes are tubers, distantly related to potatoes, and are native to South America. - grown here in Queensland or Northern NSW. They can be white, gold and red in colour.
The white ones are sometimes confused by people as yams. In fact true yams, first grown in Africa, are much larger, starchier and far less sweet. Sweet potatoes, on the other hand, can be very sweet, but the sweetness depends upon the variety.
The most popular gold sweet potato often has a deep orange flesh and is very sweet. It needs little additional sugar, and makes a fantastic treat simply baked and garnished with a little nutmeg and a pat of butter.
Sweet potatoes pack a nutritional punch that is not to be missed. They are excellent for dieters who want to fulfill their sweet tooth needs in a healthy fashion. A medium baked sweet potato, when not soaked in butter, has a modest 117 calories. It includes 3.4 grams of dietary fiber, 28 milligrams of vitamin C, 25.7 milligrams of folic acid, and 396 milligrams of potassium. As orange-fleshed root vegetables, sweet potatoes are also chock-full of vitamin A, containing over 200% of the recommended daily allowance for the vitamin. Vitamin A in vegetable forms, and not derived from fish oils or liver is quite safe to eat in this amount.