Preheat oven to 350°. Place roast, fat side up, on a rack in a foil-lined roasting pan. In a small bowl, mix salt, garlic powder, rosemary, wasabi powder, butter, pepper and herbes de Provence; pat onto all sides of roast., Roast 2 to 2-1/2 hours or until meat reaches desired doneness (for medium-rare, a thermometer should read 135°; medium, 140°; medium-well 145°). Remove roast from oven; tent with foil. Let stand 15 minutes before carving.