3 lb. beef rump roast
3 tbsp. flour
15 oz. tomato sauce
1/2 c. onions (chopped)
1/3 c. packed brown sugar
2 tbsp. lemon juice
1 tbsp. instant beef bouillon
1-1 1/2 tsp. chili powder
1 clove garlic (finely chopped)
1 tsp. dry mustard
hamburger buns

Rub flour into roast. Place in bottom of crockpot and add remaining ingredients except buns. Cook on low heat for approximately 14-16 hours. Serve over buns.