Combine the first 7 ingredients and let stand 5 minutes to soften onion
With a paring knife, cut 1-inch slits about 1 1/2 inches apart in all sides
of the meat, sticking the knife to the middle of the roast. Pry open slits and
fill each with about 1/2 teaspoon of the mixture, using the point of a teaspoon.
Cover and marinate overnight in the refrigerator.
Place roast on a rack in a roasting pan. Cover with foil or roaster cover.
Bake at 325 degrees F for 3 1/2 hours or until meat is tender, removing
cover 40 minutes before baking time is up to permit meat to brown.
Remove roast to a platter.
Skim excess fat from pan drippings.
Blend cornstarch with the 1 teaspoon water. Add to drippings. Stir and cook
until gravy is slightly thick.