
Pound thickest part of the chicken breast into uniform thickness aiming for 3/4 inch thick and if very large, cut into uniform sizes roughly 5-6 ounces each.
Mix marinade ingredients together in a small bowl. Set aside 2 tablespoons (for garnish). Place chicken and marinade in a bowl, baking dish or large zip lock bag and massage to coat all sides well. Marinate for 30 minutes, a few hours, overnight or even a few days.
Preheat grill to medium-high. Lift chicken breasts out of the bowl, letting most of the oil drip off -before carefully placing it on the grill. Cut the zested lemons in half, placing open sides down on the grill too. Feel free to add any veggies to the grill.
Close the grill lid and cook for 5-6 minutes (or until deep golden grill marks appear) before flipping. Cook the other side for another 5-7 minutes until the thickest part of the breast registers at 160F.
Let it rest for 5-10 minutes before serving. Place the grilled chicken on a serving platter, squeeze generously with the grilled lemon, and tuck in fresh herbs for garnish. Spoon the reserved 2 tablespoons marinade over the chicken, and serve!