Tarragon-Scented Chicken Tetrazzini is a classic comfort food dish with a twist. Tender chicken breast is cooked with mushrooms, onions, and garlic in a creamy tarragon-infused sauce. The mixture is then combined with cooked spaghetti and topped with a breadcrumb and Parmesan cheese crust. Baked until golden and bubbly, this dish is perfect for a cozy family dinner or potluck gathering.