You are going to wonder why you haven’t heard of this dish before after you try it and see how easy and delicious it is. Feel free to use olive oil in place of the butter if you want to keep the dish vegan. We like the roundness that the butter gives the recipe and since it is only one tablespoon we still count this dish as heart healthy. Sweet potatoes are a good source of potassium, manganese, dietary fiber, niacin, vitamins (A, B1, B2 and B6) and phosphorus.