01 - Pat the chicken thighs dry with paper towels and season generously with salt and pepper. Lightly dredge each thigh in flour, shaking off any excess.
02 - Heat the olive oil in a large Dutch oven or heavy-bottomed pot over medium-high heat. Sear the chicken thighs on both sides until golden brown, approximately 4 minutes per side. Transfer to a plate and set aside.
03 - In the same pot, add the diced onion, carrots, and celery. Sauté for 5 to 6 minutes until the vegetables have softened. Add the minced garlic and cook for an additional minute until fragrant.
04 - Pour in the dry white wine, scraping the bottom of the pot to release any browned bits. Allow the wine to reduce for 2 to 3 minutes.
05 - Add the diced tomatoes, chicken stock, dried thyme, and bay leaf. Return the browned chicken thighs to the pot and bring everything to a gentle simmer.
06 - Cover the pot and cook over low heat for 1 hour, stirring occasionally, until the chicken is fall-off-the-bone tender.
07 - Remove the lid for the last 15 minutes of cooking to allow the sauce to reduce and thicken to your desired consistency.
08 - Stir in the lemon zest and chopped parsley just before serving. Adjust seasoning with salt and pepper to taste. Serve hot alongside polenta, mashed potatoes, or crusty bread.