4 lbs. boneless beef chuck roast
1 med. onion, chopped
1 1/2 c. hickory smoke flavored BBQ sauce
1 c. catsup
1/2 c. brown sugar
1 tbsp. mustard
Chili pepper to taste

Cut roast in half; place in 3 quart crock pot. In medium size bowl stir together remaining ingredients; pour over beef in crock pot. Cook on low setting for 10 to 12 hours, stirring occasionally. With fork separate large pieces of beef, beef should be tender enough to separate into small pieces. Skim fat before serving. Spoon onto hamburger buns. Serves 12.