Sirloin tip steak is a lean cut, which means you'll need to marinate and slice it thin and/or cook it slowly to tenderize the meat.
 
The best use of sirloin tip steak includes grilling or cooking on a grill pan over medium-high heat. This cut is also great for dishes like tips and gravy, or it can be used for pot roast. For grilling, aim for medium-rare to medium doneness to retain its tenderness and flavor.