This hearty and filling casserole is made with layers of tender cod fillets, sliced potatoes, and a creamy sauce. The fish is seasoned with a blend of herbs and spices, including thyme, rosemary, and garlic powder, which infuses it with a delicious flavor. The sauce is made with milk, cream, and cheese, which gives it a rich and creamy texture. This recipe is perfect for a family dinner, and it pairs well with a side of green beans or roasted vegetables.