½ cup extra virgin olive oil
½ cup balsamic vinegar (or other vinegar)
¼ cup soy sauce
¼ cup Worcestershire sauce
⅛ cup lemon juice
¾ cup brown sugar
2 tsp dried rosemary
2 tbsp Dijon or Spicy Brown mustard
2 tsp salt
1 tsp ground black pepper
2 tsp garlic powder
6 chicken breasts or 3.5 lb chicken

2 tsp dried rosemary 2 tbsp Dijon or Spicy Brown mustard 2 tsp salt 1 tsp ground black pepper 2 tsp garlic powder 6 chicken breasts or 3.5 lb chicken

Combine all ingredients, except for chicken, in a large Pyrex measuring cup or mixing bowl and whisk together.
Remove a half a cup of marinade and reserve for basting the chicken later.
Place chicken in a large, ziploc bag and pour marinade over the top. Close securely.
Marinate for at least 4 hours and up to 24 hours.
To grill
Preheat grill to medium high heat and lightly oil the grates.
Remove the chicken from the marinade, letting the excess drip off.
Grill chicken for 5 to 6 minutes on each side or until cooked through.
Baste the chicken occasionally with the reserved marinade.
Remove chicken from grill and tent with foil. Let chicken rest for at least 5 minutes before serving
Optional.
If you bring the reserved marinade up to a boil, let simmer until slightly reduced, it makes a wonderful sauce to go on top of the chicken.