Oven Barbecue Chicken

1 (about 3 lbs.) whole chicken
3 Tbls. vegetable shortening
1 medium onion, chopped
1 tsp. salt
2 heaping Tbls. brown sugar
1 Tbls. Worcestershire sauce

Sauce:
1/2 cup water
3 tsp. apple-cider vinegar
1/2 Tbls. dry mustard
1 (8 oz.) can tomato sauce

Cut chicken into serving size pieces and brown in hot shortening in frying pan; set browned chicken pieces in roasting pan. Brown chopped onion in shortening left in pan; add the rest of the sauce ingredients and let simmer 30 minutes. Pour sauce over chicken and cover pan.
Bake at 350 degrees for 1 hour, or until tender. Enjoy!