Pre heat grill or grill pan on medium high heat and spray with non stick cooking spray or olive oil. Once pan is hot, reduce heat to just below medium.
In a small bowl combine the dijon mustard, honey and parsley flakes and set aside.
Flatten chicken breasts to an even thickness by placing between two sheets of parchment paper and pounding with a rolling pin or heavy bottomed pan. Season with salt and pepper to your liking.
Place chicken on grill for 3 minutes, then flip over and brush the chicken with the honey dijon sauce. Grill for an additional 2-3 minutes, until internal temperature reaches 155 degrees F. then remove from grill loosely cover with tin foil. Let rest for 5 minutes before enjoying. Serve with any additional sauce on the side for dipping.
Try serving with a side of steamed broccoli sprinkled with garlic salt and freshly grated parmesan cheese for a complete meal!