Prep the marinade: In a bowl, whisk olive oil, lemon juice, garlic, salt, black pepper, paprika, honey, oregano, and red pepper flakes if using.
Marinate the turkey: Pat the cutlets dry. Add them to a large zip-top bag or shallow dish and pour the marinade over.
Coat well. Let rest for 20–30 minutes at room temperature, or up to 2 hours in the fridge.
Preheat the grill: Heat a gas or charcoal grill to medium-high. If using a grill pan, preheat over medium-high until hot.
Oil the grates or pan lightly to prevent sticking.
Grill the cutlets: Shake off excess marinade. Place cutlets on the grill and cook 2–3 minutes per side, depending on thickness. You want light char marks and an internal temperature of 165°F (74°C).
Rest briefly: Transfer to a plate and tent loosely with foil.
Rest 3–5 minutes to keep the juices in.
Finish and serve: Squeeze a little extra lemon over the top, sprinkle with fresh parsley, and add more cracked pepper if you like. Serve with a simple salad, grilled vegetables, or rice.