Place Sirloin Butt in a roast pan. Rub salt and pepper into roast. Rough cup vegetables, mince garlic add to roast pan. Place roast in a 325 - 350 degree oven. Roast for 1 1/2 hours. Add 1 quart of beef stock or water To cook to medium add an additional 45 minutes.
When meat has been removed, take pan drippings add an additional pint of beef stock, season to taste, strain and serve as hot au jus with slices of roast.