Barbecue Beef Short Ribs

3 1/2 pounds Beef short ribs
1 tablespoon Vegetable oil
1 Large onion, cut into wedges
4 Medium potatoes, peeled
4 Medium carrots; pared, cut up
1 cup Water
1/2 cup Tomato Sauce
1/3 cup Red wine vinegar
1 tablespoon Paprika
1 teaspoon Curry powder
1/2 teaspoon Chili powder
1/2 teaspoon Dry mustard
2 teaspoons Salt
1 tablespoon Cornstarch, optional
2 tablespoons Water

Brown ribs in vegetable oil; place in crock pot with onions, potatoes and carrots. Mix next 8 ingredients and pour over ribs and vegetables. Cover and cook on low for 8-10 hours. Thicken with cornstarch mixed with water, if desired. Serves 4.