Top Sirloin is delicious, tender, lean and versatile. It can be marinated in 1/2 cup cooking wine or red wine and 1/4 cup vegetable oil with other seasonings added as desired. Marinate for about 2 hours at room temperature and cook on grill. It makes wonderful stir-fry dishes or kabobs. It can also be sliced thin, stir-fried and added to tossed salad for a quick and easy summer meal. Cook only until meat is still pink. Pan frying is also a good method of preparation. Brown both sides in a little hot oil, then cover pan and simmer on low heat until tender, about 15 minutes.