Preheat your oven to 400°F (200°C).
In a bowl, mix olive oil, lemon zest, lemon juice, black pepper, garlic powder, and salt.
Place the chicken breasts in a baking dish.
Pour the lemon pepper mixture over the chicken, ensuring it's well coated.
Let the chicken marinate for at least 10 minutes.
Bake the chicken for 20-25 minutes until cooked through.
Use a meat thermometer to ensure the internal temperature reaches 165°F (75°C).
Remove the chicken from the oven and let it rest for 5 minutes.
Garnish with fresh parsley before serving.
Serve with your choice of sides.