Red Onion and Honey Mustard Barbequed Chicken

2-3 tablespoons vegetable oil
1/2 red onion, chopped
1/4 cup apple cider vinegar
1/4 cup brown sugar
1 cup chicken stock
1/2 cup prepared honey mustard
1/2 teaspoon allspice
1/2 teaspoon curry powder
4 pieces boneless skinless chicken breasts
4 boneless skinless chicken thighs
vegetable oil, for drizzling
salt & freshly ground black pepper

1. Preheat grill pan or griddle over medium high heat, or you may use broiler.
2. Pour 2 tablespoons vegetable oil into a small saucepan over moderate heat.
3. Add red onions and saute 3 to 5 minutes.
4. Add vinegar and reduce by half, 1 to 2 minutes.
5. Add brown sugar and cook about 1 minute to incorporate.
6. Whisk in broth and honey mustard, allspice and curry.
7. Bring sauce to a bubble and reduce heat to lowest setting.
8. Cover chicken with a drizzle of oil and salt and pepper, to your taste.
9. Place chicken on hot grill (or put in broiler) and cook 4 or 5 minutes, then turn.
10. Baste chicken liberally with sauce and cook another 5 minutes.
11. Turn once again and baste.
12. Cook 2 or 3 minutes more to cook through and transfer chicken to a platter and serve.