Top sirloin is one of the leaner cuts, which makes it an even better beef option for some people than fattier cuts. After all, too much fat in your diet can raise cholesterol levels, which can be a problem for anyone at risk of heart disease.
Cook sirloin steak for at least an hour at 130℉ if you settle for a slow cooking method. If you choose to go for a fast method, tenderize and then sear the steak at 400 ℉ for approximately 2-3 minutes.