How do you cook a boneless beef sirloin tip roast?

You could fix it with mushrooms. cover the roast with instant onion soup and mushroom and 1 cup of water wrap tight with foil cook in the oven for about 2 to 31.2 hours at 350 degrees. Make a sauce or gravy with the dripping to cover the thinly sliced roast. You could also cover it with Italian seasoning and tomato sauce and roast serve with noodles covered with the sauce from the roast. This is good.