Preheat oven to 450°F Place the roast in a shallow roasting pan and allow it to rest out of the refrigerator for 30 minutes, to bring the meat to just about room temperature. Combine seasonings to make rub. Rub the meat all over with this mixture, patting it into the meat -- particularly on top. Place the roast in the oven for 15 minutes or until the meat starts to brow (the high heat will sear the roast, sealing in the juices.) Reduce the heat to 350°F and continue to cook 12-15 minutes per pound, depending on the desired degree of doneness. Remove roast from the oven and allow the meat to rest for 20 minutes. Before carving, slice a piece of the exterior rosemary-scented fat from the meat and rub it into the carving board to further season roast.
Gravy (optional). For gravy, thicken the pan juices with enough flour to make a paste (start with 1/3 cup.) Cook over moderate heat for 10 minutes, stirring constantly until the flour has browned and thinned slightly. Whisk in enough stock for a smooth sauce (about 2 cups for the average roast.) Simmer 10 minutes and adjust seasonings with salt, pepper, rosemary and/or parsley.
DEGREE OF DONENESS Roasting Time / Internal Temperature:.
Rare, 15 minutes per pound - 125°F.
Medium Rare, 17 minutes per pound - 130 to 135°F.
Medium, 18 minutes per pound - 140°F.
Medium Well, 19 minutes per pound - 150°F.
Well Done, 20 minutes per pound - 160°F.