This chicken with tarragon and mustard gravy is a flavorful and comforting dish that is perfect for a cozy dinner. The chicken is cooked to perfection and then smothered in a creamy gravy made with tarragon and mustard. The combination of the herby tarragon and tangy mustard creates a delicious sauce that pairs perfectly with the tender chicken. Serve this dish with mashed potatoes or rice for a complete meal.