01 - Pat chicken thighs dry with paper towels and season generously with salt and pepper on both sides.
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 5 minutes more. Remove chicken and set aside.
03 - Add onion, carrot, celery, and bell pepper to the same pot. 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 with a wooden spoon. Let the wine reduce for 1 minute.
05 - Stir in diced tomatoes, chicken broth, oregano, thyme, basil, bay leaf, and lemon zest if using. Bring to a gentle simmer.
06 - Return chicken thighs to the pot, arranging them skin side up. Cover with lid, reduce heat to low, and braise for 40 minutes until chicken is tender and cooked through.
07 - Remove the lid and continue simmering uncovered for 10 minutes, allowing the sauce to reduce and thicken slightly.
08 - Discard the bay leaf. Sprinkle fresh parsley over the dish. Serve hot accompanied by polenta, crusty bread, or pasta.