Season the chicken thighs with kosher salt and pepper.
Place the chicken thighs in a large Dutch oven, skin-side down, and cook until golden brown on both sides, about 5 minutes on each side. Remove the chicken from the dutch oven and set aside.
In the same dutch oven, cook the onion, carrots, and celery until tender crisp, about 7 minutes.
Add the minced garlic and cook until fragrant, about 1 minute.
Add the white wine to deglaze the pan, scraping up any browned bits from the bottom of the pot and cook for 1 minute.
Return the browned chicken thighs to the dutch oven. Add the chicken broth, fresh thyme sprigs, bay leaves, diced tomatoes with their juices, and tomato paste. The liquid should come about halfway up the sides of the chicken thighs.
Bring to a boil. Reduce the heat to low and cook, covered, for 30 minutes, or until the chicken is cooked through. Use an instant read thermometer to check that the chicken temperature has reached 165F.
Remove the bay leaves and discard before serving.
To serve, place a chicken thigh on each plate and spoon the flavorful braising liquid and vegetables over the top. Garnish with chopped fresh parsley.