Absolutely! I like to use turkey sausage because it is leaner than other options.  Another lower-calorie, high-protein option is chicken sausage. This sweet potato hash recipe does call for using raw sausage, though. If you want to use pre-cooked sausages (like chicken apple sausage or other pre-cooked sausages from the store), those would need to be sliced in rounds and browned in the skillet. The final result will be different but still delicious.