Cut the chicken breasts in half widthways to make 2 thinner pieces.
Grate the zest of the lemons and squeeze all the juice out. With a hand blender, blend together the herbs with the garlic, olive oil, a pinch of freshly ground black pepper, half the lemon juice and all the lemon zest. Pour the marinade over the chicken and leave it to marinate in the fridge for at least 1 hour.
Once you are ready to cook the chicken, heat a griddle pan on the stove top. Sprinkle some salt over the chicken pieces and then grill them on the hot griddle pan for a few minutes on each side until they have a nice charred colour and the chicken is cooked all the way through. Once you have cooked all the chicken, pour the remaining lemon over the chicken and serve.