In a large mixing bowl, whisk together the olive oil, red wine vinegar, soy sauce, brown sugar, garlic powder, rosemary, and salt. Whisk well until marinade forms.
Place the chicken into a baking dish or plastic baggie and pour the marinade over the top. *Cover with plastic wrap or seal, and marinate in the fridge for at least 1 hour, but ideally overnight.
Heat the grill and add the chicken breasts over the direct heat. Brush with the marinade and discard remaining marinade. Let cook for 4 to 5 minutes per side, then move over indirect heat and grill until cooked through. Slice before serving.
Prepare the salad.
Prepare the garlic bread. (It’s delicious when grilled.)
Serve Best Grilled Chicken with a side of garlic bread and salad.