In the United States, sweet potatoes are typically associated with Thanksgiving, though these days you can buy them year-round in grocery stores. They're not only tasty, they're also one of the healthiest foods you can add to your diet. Eating them is believed to help in the fights against heart disease and cancer. They're fairly low in calories, with a medium-sized selection containing about 105. These root veggies are also fat-free, so you can indulge with no fear, as long as you prepare them in a low-cal method. We'll cover 10 delicious ways to cook sweet potatoes, some a little lighter than others.