As you embark on creating Mary Berry's fish pie, a few notes can enhance your culinary journey. Ensure the seafood is fresh for optimal flavor, and feel free to customize with your favorite fish varieties. Don't rush the sauce-thickening process; patience ensures a velvety texture. Whether opting for a pastry or mashed potato crust, remember that creativity in presentation adds to the overall dining experience. Finally, share this delectable dish with loved ones, appreciating the joy that comes with crafting a culinary masterpiece in your own kitchen.