Sweet potatoes have a similar nutritional profile to their pale cousins with slightly fewer calories and carbs, per the Cleveland Clinic. Important to note is that about half of the fiber is located in the skin of the potato (either sweet or white) and leaving the skin on will make it significantly healthier as a result. You can use a sweet potato in virtually any recipe that calls for regular potatoes, including casseroles, chips, and fries. Because they are a root vegetable, they tend to have a long cook time, but the result is worth it. Here are two delicious and healthy ways to cook sweet potatoes: roasted, and made into sweet potato fries.