a hot skillet in olive oil, sear Roast of Beef on all sides.
from heat and deglaze with stout, stirring to remove all the tasty
bits from the bottom.
To the stout,
add 1 jar beef gravy, cornstarch, salt, pepper and stir until
and mushrooms to crock-pot.
mixture over contents in crock-pot, cover with lid and cook on
low for 6-8 hours.