Quick Fish Au Gratin is a delicious and easy-to-make dish that combines tender fish fillets with a creamy and cheesy sauce. The fish is first seasoned and then baked in the oven until it is flaky and cooked through. The sauce is made with a combination of milk, cheese, and seasonings, which adds a rich and savory flavor to the dish. This recipe is perfect for a quick weeknight dinner or a special occasion.