Creating Garlic Parmesan Chicken and Potatoes is simple when you follow these clear steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C).
2. Prepare Baking Dish: Lightly grease a large baking dish or sheet pan with cooking spray or a little olive oil.
3. Mix Marinade: In a bowl, combine olive oil, minced garlic, Italian herbs, salt, and pepper.
4. Coat Chicken: Place the chicken breasts in the bowl with the marinade, ensuring they are well coated. Set aside to marinate for about 10 minutes.
5. Prepare Potatoes: In a separate bowl, toss the halved baby potatoes with the remaining marinade until evenly coated.
6. Arrange in Dish: Place the marinated chicken breasts in the center of the baking dish. Surround them with the coated baby potatoes.
7. Sprinkle Cheese: Generously sprinkle grated Parmesan cheese over the chicken and potatoes.
8. Bake: Place in the preheated oven and bake for 45 minutes, or until the chicken is cooked through and the potatoes are golden and crispy.
9. Check Doneness: Use a meat thermometer to ensure the chicken has reached an internal temperature of 165°F (75°C).
10. Rest and Garnish: Once done, remove from oven and let it rest for 5-10 minutes. Garnish with chopped fresh parsley before serving.