01 - Pat chicken thighs dry with paper towels and season both sides generously with salt and pepper.
02 - Heat olive oil in a large Dutch oven or deep skillet over medium-high heat. Add chicken thighs skin side down and sear until golden brown, about 5 minutes. Flip and cook 5 minutes more. 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 softened and fragrant. Add garlic and cook for 1 minute more until aromatic.
04 - Pour in white wine if using, scraping up any browned bits from the bottom of the pot with a wooden spoon. Let it bubble and reduce for 1 minute.
05 - Stir in diced tomatoes, chicken broth, oregano, thyme, 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. Once simmering, cover with lid and reduce heat to low. Braise gently for 40 minutes until chicken is tender and cooked through.
07 - Remove lid and simmer uncovered for 10 minutes to allow sauce to thicken slightly and intensify in flavor.
08 - Discard bay leaf. Transfer chicken to serving platter or serve directly from pot. Garnish with fresh chopped parsley. Serve hot alongside polenta, crusty bread, or pasta.