Barbecued Beef Short Ribs

This is so good. It's so much better than just using BBQ sauce.

3 to 4 lbs. beef short ribs
1 TBS. vegetable oil
2 1/2 c. water, divided
1 can (6 oz.) tomato paste
1 c. ketchup
1 garlic clove, minced
3/4 c. packed brown sugar
1/2 c. chopped onion
1/2 c. vinegar
2 TBS. prepared mustard
1 1/2 tsp. salt

In a deep skillet, brown the ribs in oil. Add 2 c. water, bring to a boil. Reduce hear, cover and simmer for 1 1/2 hours. Drain. Combine the tomato paste, ketchup, garlic, brown sugar, onion, vinegar, mustard, salt and remaining water, mix well. pour over ribs, bring to a boil. Reduce heat, cover and simmer for 1 hour or until meat is tender.