Preheat oven to 375 F.
Heat some cooking fat in an ovenproof skillet and season the chicken thighs with salt and pepper.
Cooking fat, Sea salt and freshly ground black pepper
Brown the chicken for 2 to 3 minutes per side; set aside.
6 to 8 chicken thighs
Lower the heat and add the olive oil to the same skillet used for the chicken.
¼ cup olive oil
Add the carrot, celery, onion, and garlic, and cook for 2 to 3 minutes.
1 onion, 2 to 3 carrots, 2 celery stalks, 2 garlic cloves
Pour in the chicken stock and bring to a simmer until evaporated by half.
1 cup chicken stock
Add the diced tomatoes, tomato sauce, tomato paste, lemon zest, parsley, oregano, and thyme; season everything to taste.
2 cups tomatoes, ½ cup tomato sauce, 2 tbsp. tomato paste, 1 tbsp. fresh lemon zest, 2 tbsp. fresh parsley, 1 tsp. dried oregano, ½ tsp. dried thyme, Sea salt and freshly ground black pepper
Stir the ingredients in the pan, then add the chicken thighs.
Place in the oven and cook for 20 to 25 minutes, or until chicken is cooked through.
Adjust seasoning and serve topped with fresh parsley.