Preheat oven to temperature 325°F Combine first 4 ingredients in a bowl and refrigerate. Season roast with salt and pepper to taste. Heat oil in a heavy flameproof casserole over medium-high heat. Sauté roast 2-3 minutes until brown on all sides. Transfer to oven and roast 22 minutes per 1 lb for medium rare meat. Cook longer if desired. Let stand 15 minutes (this is very important or the juices will all run out and it will be dry) before cutting into thin slices and serving with sauce.