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 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 about 1 minute.
05 - Stir in diced tomatoes, chicken broth, oregano, thyme, basil, bay leaf, and lemon zest if using. Bring the mixture to a gentle simmer.
06 - Return chicken thighs to the pot, arranging them skin side up. Cover with a lid, reduce heat to low, and braise for 40 minutes until chicken is tender and cooked through.
07 - Remove the lid and simmer uncovered for 10 minutes to allow the sauce to reduce and thicken slightly.
08 - Discard the bay leaf. Sprinkle with fresh parsley and serve hot alongside polenta, crusty bread, or pasta.