In a large baking dish toss together the tomatoes, onion, olives, 2 garlic cloves, 1 tablespoon of the oil, 1 teaspoon herbes de provence, fennel seeds, salt and pepper.
Place the chicken pieces in the baking dish with the vegetables, sprinkle with the remaining oil, garlic and herbs and pour in the stock. Roast for 45 minutes or until the chicken is cooked.
Rest for 10 minutes. Serve the chicken with the vegetables and pan juice.