Chicken in Balsamic Barbecue Sauce

I found this recipe on-line while looking for South African recipes and it stated: "adapted from South African Gourmet Food and Wine by Rosen & Loon"

• Ready In: 50 mins
• Serves: 6

Ingredients

• 8  chicken breasts, Medium
• 1  small onion, Finely Chopped
• 1⁄4 cup olive oil
• 3⁄4 cup  balsamic vinegar
• 3  tablespoons sugar
• 6  tablespoons ketchup
• 2  tablespoons Worcestershire sauce
• 4  green onions, Chopped
• 1  chicken bouillon cube, Crushed
• 1  teaspoon salt
• 1  teaspoon pepper
• 1  teaspoon dry mustard
• 3  garlic cloves, Finely Chopped
•  Tabasco sauce, To Taste

Directions

1. Combine all ingredients except chicken.
2. Marinate chicken in half the sauce for 3 hours or overnight.
3. Put remaining marinade aside.
4. Remove chicken from marinade, place chicken in foil-lined pan and broil until nicely browned about 10- 20 minutes per side(depending on the size), or grill on the bbq.
5. Heat reserved marinade and pour over chicken. Serve.