Marinate the Chicken: In a bowl, mix olive oil, lemon juice, garlic, and Greek chicken seasoning. Coat the chicken thighs and marinate for at least 20 minutes.
Sear the Chicken: Heat a skillet over medium-high heat. Sear the chicken for 3 minutes on each side until golden.
Prepare the Rice: Melt butter in the same skillet, toast the rice for 2 minutes, and add chicken broth, lemon zest, and salt. Stir well.
Combine and Bake: Place chicken thighs on top of the rice, cover, and bake at 375°F (190°C) for 25 minutes.
Serve: Garnish with fresh parsley and lemon slices. Fluff the rice before serving.