Garlic, onion, tomatoes, mushrooms, and white wine lend Provencal flavors to this simple-yet-delicious skillet supper. The chicken is rubbed with a garlicky mixture before being sauteed until golden brown, then it is cooked gently with tomatoes and onion until tender throughout. The sauce, cooked in the same pan, features sliced mushrooms cooked with flour, chicken broth, and wine until thickened. Round out the meal with mashed potatoes and a salad, if desired.