Prep and Season the Chicken: Pat the chicken thighs dry. In a small bowl, mix the salt, garlic powder, onion powder, smoked paprika, and black pepper. Rub this seasoning all over the chicken thighs.
Sear the Thighs: Heat the olive oil in a cast iron skillet over medium-high heat. Once hot, add the chicken thighs, skin-side down, and cook for 5-7 minutes until the skin is golden and crispy. Flip the chicken and cook for another 3-4 minutes. Transfer the thighs to a plate (they’ll finish cooking in the sauce).
Sauté the Aromatics: In the same skillet, add the diced onion and minced garlic, cooking until they’re softened and fragrant, about 2-3 minutes.
Add Tomato Paste and Deglaze: Stir in the tomato paste, letting it cook for a minute. Then, pour in the white wine, scraping up any browned bits from the pan. Let the wine reduce by half, about 3 minutes.
Create the Sauce: Add water, cream, bell peppers, and mushrooms. Stir to combine, and let it simmer for 5 minutes.
Return the Chicken: Nestle the chicken thighs back into the skillet, spooning some of the sauce over the top. Reduce heat to low, cover, and simmer for 15-20 minutes, until the chicken is cooked through and tender.
Serve: Garnish with freshly chopped parsley and serve straight from the skillet.