Prep the Chicken:
Pat chicken thighs dry with paper towels. Season with salt, pepper, smoked paprika, and garlic powder.
Heat olive oil in an oven-safe skillet over medium-high heat. Place chicken skin-side down and cook until golden and crispy (5 minutes).
Flip chicken and cook for another 3 minutes. Remove from skillet and set aside.
Make the Bravas Sauce:
In the same skillet, add more oil if needed. Add onions and cook until soft (3-4 minutes). Add garlic and cook for 30 seconds.
Add red bell pepper and cook for 3 more minutes. Stir in tomato paste and cook for 1 minute.
Add diced tomatoes, smoked paprika, cayenne, oregano, cumin, bay leaf, and chicken broth. Simmer for 10 minutes until thickened. Adjust seasoning to taste.
Combine and Bake:
Preheat oven to 375°F (190°C).
Place browned chicken pieces back into the sauce, skin-side up.
Transfer to the oven and bake uncovered for 25-30 minutes or until chicken reaches an internal temperature of 165°F (75°C).
Let rest for 5 minutes before serving.