Preheat the oven to 400°F (200°C).
Season the chicken thighs with salt, pepper, smoked paprika, and oregano.
In a large oven-safe skillet, heat olive oil over medium-high heat. Add the chicken thighs, skin-side down, and sear until golden brown, about 5-7 minutes.
Flip the chicken and cook for an additional 5 minutes, then remove from skillet and set aside.
In the same skillet, add the diced onion and bell pepper, and cook until softened, about 3-4 minutes.
Add the minced garlic and cook for an additional minute, stirring frequently to prevent burning.
Stir in the rice, coating it with the vegetable mixture, then pour in the chicken broth and lemon juice.
Nestle the browned chicken thighs back into the skillet, skin-side up, and bring the mixture to a simmer.
Cover the skillet with a lid or foil and transfer it to the preheated oven. Bake for 30-35 minutes, or until the rice is cooked and the chicken reaches an internal temperature of 165°F (75°C).
Remove from the oven, let it rest for 5 minutes, then garnish with fresh parsley before serving.