Snappy Barbecue Beef Sandwiches
["1 beef chuck roast (4 lb.)", "1 c. catsup", "1 c. barbecue sauce", "4 c. chopped celery", "2 c. water", "1 c. chopped onion", "2 Tbsp. vinegar", "2 Tbsp. brown sugar", "2 Tbsp. Worcestershire sauce", "1 tsp. chili powder", "1 tsp. garlic powder", "1 tsp. salt"]
["Cut all the fat you can off of the roast.", "Place beef in Dutch oven.", "Combine all remaining ingredients; pour over beef.", "Cover and bake at 350\u00b0 for 5 hours, turning beef occasionally.", "Shred beef with a fork, removing any fat.", "Serve on rolls or buns. Yields about 24 servings."]
["chuck roast", "catsup", "barbecue sauce", "celery", "water", "onion", "vinegar", "brown sugar", "Worcestershire sauce", "chili powder", "garlic powder", "salt"]