barbecue beef sandwiches

Ingredients For barbecue beef sandwiches

• 3 lb

  beef rump roast
• 1 tsp

  dry mustard
• 1

  garlic clove, minced
• 2 tsp

  chili powder
• 1 Tbsp

  beef bouillon
• 2 Tbsp

  lemon juice
• 1/3 c

  brown sugar, firmly packed
• 1/2 c

  onion, chopped
• 15 oz

  tomato sauce
• 3 Tbsp

  flour
• 1 pkg

  hamburger buns