Oven Barbequed Chicken Wings

2 Tbs olive oil
¼ cup finely chopped onion
½ cup Ketchup
2Tbs Worcestershire sauce
1 Tb White Vinegar
1 tbs fresh lemon juice
1/8 tsp pepper
½ tsp dry mustard
1 ½ lb. chicken wings

Heat oil in medium sauce pan Add onion and sauté for 5 minutes. Add ketchup, worcestershire sauce vinegar, lemon juice, pepper and dry mustard. Simmer for 12 minutes. Cut chicken wings at the joint, rinse and pat dry. Place chicken pieces in a pan and coat liberally ¾ of the sauce. Bake in preheated 450 degree oven for 50minutes. Baste occasionally with remaining sauce.