Preheat your oven to 425°F (220°C).
In a large oven-safe skillet, heat 2 tablespoons of olive oil over medium-high heat. Season the chicken thighs with salt, pepper, garlic powder, onion powder, and half of the oregano.
Once the oil is hot, place the chicken thighs skin-side down in the skillet. Sear for about 5-7 minutes until the skin is golden brown and crispy.
Remove the chicken from the skillet and set aside. In the same skillet, add the halved baby potatoes and the remaining olive oil, oregano, lemon zest, salt, and pepper. Stir to coat the potatoes evenly.
Nestle the chicken thighs back into the skillet, skin-side up, on top of the potatoes. Squeeze the lemon juice over the chicken and potatoes.
Transfer the skillet to the preheated oven and roast for 25-30 minutes, or until the chicken is cooked through (internal temperature of 165°F) and the potatoes are crispy and tender.
Remove from the oven and let rest for 5 minutes. Garnish with fresh parsley before serving.