Cut about five deep slits across top of roast. Combine seasonings; stuff some into the slits. Tie meat securely. Rub roast with remaining seasonings. Place in a large resealable plastic bag and refrigerate overnight. Remove roast from bag and place in a greased roasting pan. Bake, uncovered, at 160ºC or 2.5 to 3 hours or until a meat thermometer reads 170 degrees servings.