Can you freeze leftover fish pie? Make sure the fish pie is fully cooled then transfer to a sealed container and freeze for up to 3 months. To reheat simply remove the fish pie from the freezer and completely defrost before cooking in the oven for 30 minutes at 180 degrees C. You should cover the pie with foil to prevent the top from crisping up too much as you are cooking it a second time. Remove the foil for the last 5 minutes to finish, check the pie is hot throughout and enjoy.
Classic Fish Pie Recipe https://properfoodie.com/fish-pie-cheese-sauce-mash-topping/