01 - Preheat oven to 375°F.
02 - Pat chicken thighs dry with paper towels and season generously with salt and black pepper on all sides.
03 - Heat 2 tbsp olive oil in a large oven-proof skillet or Dutch oven over medium-high heat. Add sausage pieces and cook until evenly browned, about 4 minutes. Remove with a slotted spoon and set aside.
04 - In the same skillet, place chicken thighs skin-side down. Sear for 5 to 7 minutes per side until deeply golden and crispy. Remove chicken and set aside with the sausage.
05 - Drain excess fat from the pan, leaving about 1 tbsp. Add sliced onion, bell peppers, and minced garlic. Sauté until the vegetables soften and become fragrant, about 5 minutes.
06 - Stir in the halved cherry peppers and cook for an additional 2 minutes to release their tangy flavor.
07 - Pour in the dry white wine, scraping up any browned bits from the bottom of the pan. Let the wine reduce by half, approximately 3 minutes.
08 - Add chicken broth, red wine vinegar, dried oregano, and fresh rosemary. Stir to combine. Return the sausage and chicken to the skillet, arranging the chicken skin-side up.
09 - Bring the mixture to a simmer on the stovetop, then transfer the uncovered skillet to the preheated oven. Bake for 30 minutes until the chicken is cooked through and the sauce has thickened.
10 - Remove from the oven and garnish with freshly chopped parsley before serving. Serve with crusty bread, polenta, or roasted potatoes.