Yes, you can use sweet potato but I recommend using my roasted cubed sweet potato. You could try and grate sweet potato to cook as a hash brown but it doesn't tend to stick to the pan. Simply mix in roasted cubed sweet potato instead for the simplest option. If you don't have leftover cooked sweet potato, roast the sweet potato along with the bacon or sausage of your choice in the oven rather than following the stovetop method.