Make the marinade: In a bowl, whisk together olive oil, Parmesan, garlic, lemon juice, Italian seasoning, salt, and pepper.

Pound the chicken lightly for even thickness, then place it in a large resealable bag or shallow dish. Pour marinade over chicken and coat well.

Marinate for at least 30 minutes, or up to 4 hours in the fridge for extra flavor.

Preheat your grill to medium-high heat (around 400°F / 200°C). Lightly oil the grates.

Grill the chicken for about 5–7 minutes per side, depending on thickness, until nicely charred and internal temp reaches 165°F (74°C).

Remove from grill, rest for a few minutes, then sprinkle with extra Parmesan and fresh parsley.