4-5 lb. well-trimmed beef brisket
1 1/2 tsp. salt
1/2 c. finely chopped onion
1/2 c. catsup
1/4 c. vinegar
1 tbsp. Worcestershire sauce
1 1/2 tsp. liquid smoke
1/4 tsp. pepper

Rub surface of brisket with salt. Place in prepared baking bag OR 13 x 9 x 2 inch pan. Mix remaining ingredients; pour over beef. Close baking bag OR cover pan and bake at 325 degrees until tender, about 3 hours. Cut thin, diagonal slices, across grain at an angle from 2-3 "faces" of beef. Spoon remaining juices over sliced beef.