Preheat the oven to 375°F (190°C).
In a small bowl, mix together the smoked paprika, garlic powder, onion powder, dried thyme, salt, and black pepper.
Season the chicken thighs generously with the paprika mixture on both sides.
Heat the olive oil in a Dutch oven or other heavy-bottomed oven-safe pot over medium-high heat.
Once the oil is hot, add the chicken thighs skin side down. Sear for 5-6 minutes or until golden brown, then flip and sear for another 3-4 minutes.
Remove the chicken thighs from the pot and set them aside on a plate.
Add the onion and garlic to the pot and cook for 2-3 minutes or until softened.
Stir in the red bell pepper, diced tomatoes, and chicken broth.
Return the chicken thighs to the pot, skin side up, and spoon some of the sauce over them.
Cover the pot with a lid and transfer it to the preheated oven.
Bake for 35-40 minutes or until the chicken is cooked through and the sauce has thickened.
Garnish with chopped fresh parsley before serving.