This chicken and leek casserole with tarragon dumplings is a comforting and flavorful dish. Tender chicken pieces are cooked with leeks, carrots, and mushrooms in a creamy sauce infused with tarragon. The dish is then topped with fluffy dumplings flavored with fresh tarragon. The combination of the savory chicken and vegetables with the aromatic tarragon creates a delicious and satisfying meal. Perfect for a cozy dinner on a chilly evening.