Crockpot Sweet & Sour Brisket

Crockpot Sweet & Sour Brisket

1 1/2 lbs trimmed beef brisket
1/2 cup diced onions
1 (7 ounce) can sliced mushrooms, and the liquid
1/2 cup brown sugar
1/2 cup catsup
1/2 cup vinegar
1 (12 ounce) can beer
1 tablespoon cornstarch

Place all the ingredients, except the corn starch into a CrockPot and cook for 12 hours on low.
When finished, remove the brisket, shred, and return to the Crockpot.
Mix the Corn Starch with a tablespoon of water and add to the stew, mix well.