Preheat your oven to 400°F (200°C).
In a bowl, whisk together lemon juice, olive oil, minced garlic, oregano, salt, and pepper.
Place the chicken breasts in a baking dish and pour the marinade over them, coating well.
Sprinkle grated Parmesan cheese evenly over the marinated chicken.
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 5 minutes before serving.
Garnish with chopped parsley before serving, if desired.
