Sprinkle the chicken with 1 teaspoon salt on each side. Set to the side.
Combine the olive oil, lemon zest, lemon juice, garlic, rosemary, and black pepper in a shallow pie plate. Whisk well.
Then place the chicken in the marinade.
Place plastic wrap on the dish. Refrigerate for at least 30 minute, but no more then 2 hours.
Preheat grill when ready to grill to 500 degrees Fahrenheit. Reduce the heat on the grill to low. Spray with grill cooking spray.
Place the chicken breast on the grill. Cook for 10 minutes on each side until the internal temperature of the chicken reads 165 degrees Fahrenheit. Remove from the grill.
Let rest for 5 minutes then slice and divide among plates and serve with an additional lemon wedge if desired.