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.
1 1/2 lbs boneless, skinless chicken breasts (4–5 small-ish breasts) or boneless, skinless chicken thighs (6–8 pieces- see notes.)
Make the marinade: 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.
Grill: Preheat grill to medium-high. (See notes for chicken thighs.) 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- here we added halved tomatoes. Close the grill lid and cook for 5-6 minutes (or until deep golden grill marks appear) before flipping. Cook the other side, 5-7 minutes, and lower heat or move to a cooler spot until the thickest part of the breast registers at 160F and meat is no longer pink, and the meat looks opaque. Let it rest 5-10 minutes before serving.
Serve: 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! (NOTE: DO not use the “used marinade” that the raw chicken was in for this!).
zest from one medium lemon (2 tablespoons) and save the lemon for grilling/ juicing.
