Preheat the oven to 400°F (200°C).
In a mixing bowl, combine lemon juice, olive oil, minced garlic, oregano, salt, and pepper.
Place the chicken breasts in a baking dish and pour the marinade over them, ensuring they’re well coated.
Sprinkle grated Parmesan cheese over the top of each chicken breast.
Bake in the preheated oven for 25-30 minutes, or until the chicken is cooked through and the cheese is golden brown.
Remove from the oven and let the chicken rest for a few minutes before serving.
Garnish with chopped fresh parsley before serving.