01 - Pat chicken thighs thoroughly dry with paper towels. Season generously on all sides with salt and black pepper.
02 - Heat olive oil in a large Dutch oven or deep skillet over medium-high heat. Place chicken thighs skin side down and sear until golden brown, about 5 minutes. Flip and cook another 5 minutes. Remove chicken and set aside on a plate.
03 - In the same pot, add onion, carrot, celery, and bell pepper. Sauté for 5 minutes until vegetables begin to soften. Add minced garlic and cook for 1 minute until fragrant.
04 - Pour in white wine if using, scraping up any browned bits from the bottom of the pot with a wooden spoon. Let the wine reduce for 1 minute.
05 - Stir in diced tomatoes, chicken broth, dried oregano, dried thyme, dried basil, bay leaf, and lemon zest if using. Bring mixture to a gentle simmer.
06 - Return chicken thighs to the pot, arranging them skin side up. Cover with lid and reduce heat to low. Braise gently for 40 minutes until chicken is tender and cooked through.
07 - Remove lid and increase heat slightly. Simmer uncovered for 10 minutes to allow the sauce to reduce and thicken to desired consistency.
08 - Discard the bay leaf. Transfer chicken to a serving platter and spoon sauce over the top. Garnish generously with fresh chopped parsley. Serve hot alongside polenta, crusty bread, or pasta.