The Barefoot Contessa Tuna Casserole is a hearty and flavorful dish made from canned tuna, noodles, mushrooms, onions, peas, parmesan cheese, and breadcrumbs. It is the perfect comfort food for a cold winter night and is sure to please any crowd. This casserole is easy to make, with simple ingredients that you probably already have in your pantry. And it's full of nutrition too!