Cut the chicken in half. See instructions in post. Lay them on the sheet pan close but not touching.
Combine the salt, pepper, lemon zest, olive oil, lemon juice, rosemary, thyme, and garlic powder. Spread evenly over the outside of the chicken and bake for 40-45 minutes or until the internal temperature of the chicken breast reaches 165°F or 74°C.
Let the chicken rest for 5 minutes before slicing and serving.