Preheat your oven to 400°F (200°C).
In a bowl, mix olive oil, lemon juice, lemon zest, minced garlic, dried oregano, salt, and pepper to form a marinade.
Place the chicken breasts in a baking dish and pour the marinade over them, ensuring they are well-coated.
Sprinkle the grated Parmesan evenly over the marinated chicken.
Bake in the preheated oven for 25-30 minutes, or until the chicken is fully cooked through.
Once done, remove from the oven and let it rest for 5 minutes before serving.
Garnish with chopped parsley before serving.