Trim chicken breasts and cut into 3 strips lengthwise each, place in a glass or plastic bowl. Squeeze lemons over chicken, add garlic, pepper, salt and olive oil. Use a fork to toss chicken around in the marinade mixture. Cover with plastic wrap and place in refrigerator for a minimum of 3 hours. This can be prepared up to 24 hours ahead of time and easily doubled and tripled. You could also place chicken strips in marinade in a freezer bag and freeze until ready to use.
Grill chicken over medium heat until chicken is cooked through. approximately 8 minutes.