In a medium bowl combine garlic, herbs and spices. Add olive oil and lemon, then set half the charmoula mixture to the side.
Rinse chicken and pat dry. Trim the chicken breasts and pound flat between two pieces of plastic wrap until they are 1/3 inch thick. Season both sides with salt and pepper and coat with half the charmoula. Allow the chicken to marinate in the charmoula for at least 2 hours or overnight.
Grease a grill pan and cook chicken on both sides until it is completely cooked. Remove from pan and top with reserved charmoula.