Preheat your oven to 375°F (190°C).
In a large oven-safe skillet, heat the olive oil over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes.
Stir in the minced garlic, red bell pepper, and green bell pepper. Cook for an additional 3-4 minutes until the peppers soften.
Add the smoked paprika, oregano, cumin, cayenne pepper, salt, and pepper. Stir well to combine and cook for 1-2 minutes until fragrant.
Pour in the diced tomatoes and chicken broth, stirring to combine. Bring the mixture to a simmer.
Nestle the chicken thighs into the skillet, skin side up. Spoon some of the sauce over the chicken.
Transfer the skillet to the preheated oven and bake for 35-40 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (74°C).
Remove from the oven and let it rest for 5 minutes. Garnish with chopped fresh parsley before serving.