Barbecued Chicken
["1 (8 oz.) can lower-sodium tomato sauce", "1/2 c. chopped onion (1 medium)", "3 Tbsp. brown sugar", "2 Tbsp. low sodium tomato paste", "2 Tbsp. vinegar", "2 tsp. Worcestershire sauce", "1 tsp. dry mustard", "1 clove garlic, minced", "several dashes of bottled hot pepper sauce (optional)", "4 small chicken breast halves or 8 small thighs (1 1/2 lb. total) or 4 medium skinless, boneless chicken breast halves (12 oz. total)"]
["For sauce, in a small saucepan, stir together the tomato sauce, onion, brown sugar, tomato paste, vinegar, Worcestershire sauce, dry mustard, garlic and if desired, hot pepper sauce. Bring to boiling; reduce heat.", "Simmer, uncovered, for 20 to 25 minutes or until desired consistency, stirring occasionally. Remove half of the sauce (about 1/2 cup).", "Cover and store in the refrigerator for another use for up to 2 weeks."]
["lower", "onion", "brown sugar", "tomato paste", "vinegar", "Worcestershire sauce", "dry mustard", "clove garlic", "pepper sauce", "chicken"]