Poke the chicken all over with the tines of a fork

Whisk together the vinegar, Italian seasoning, olive oil, salt, pepper and parsley in a small bowl

Pour mixture over the chicken and marinate in the refrigerator for 30+ minutes

Heat a grill to medium-high heat

Remove the chicken and place on the grill (discard marinade)

Cook for 7 minutes on one side. Flip and cook for an additional 5 minutes or until the chicken registers 165 degrees with a meat thermometer