Oven Pot Roast with Beer

4 pounds chuck roast -- * see note

yellow onion -- sliced 2 celery stalks -- chopped

1/4 cup green peppers -- chopped

1/3 cup water

1/2 cup chili sauce

1/4 teaspoon black pepper

1/2 teaspoon salt

12 ounces beer

* Use a chuck roast or similar cut.

Place roast in large oven-proof pan with lid. Mix the remaining ingredients except beer and pour evenly over roast. Roast uncovered in 350-degree oven for 1 hour. Pour room temperature beer over, COVER, and cook for 2-3 hours longer depending on the thickness of the roast. Thicken liquid with flour if you wish.