Rub
roast with salt and pepper. Make small slits in roast and
insert slices of garlic. Put 1 sliced onion in bottom of
crock-pot. Place roast on top of onion and add other
ingredients. Cover and cook on low for about 8 hours.
To make
a thicker gravy remove roast from pot. Blend 2 tablespoons
cornstarch with 2 tablespoons of cold water to form a smooth
paste. Set on high and pour in paste. Stir well and let
come to a boil (about 15 minutes) until thickened.