Mary Berry's Easy Fish Pie Recipe

Mary Berry has many easy recipes for families. She makes classic dishes in her own way.
Her fish pie recipe is very good. Mary adds wine and leeks to make it special, but you can use milk for kids.
This recipe serves six and can be made ahead. Mary says it's great for family gatherings or parties.
Wine and leeks make the pie taste better, but you can use milk for kids.
You can make the pie ahead and chill it. You can also freeze it without eggs.
Mary adds prawns, mussels, spinach, and peas for more flavor.
The fish pie can be made ahead.
Here are the ingredients.
First, the potato topping.
Then, the fish filling.
Now, the method.
Preheat the oven to 200°C.
Boil the potatoes, then mash with butter and milk. Add pepper and salt to taste.
Make the fish filling by melting butter and adding leeks. Simmer for 10 minutes.
Mix flour, wine, or milk in a bowl. Whisk until smooth.
Add milk, wine, and parsley to the leeks. Stir until thickened, then add fish.
Stir for two minutes, then put in a dish. Add eggs and let cool.
Put mashed potatoes on top, add cheese, and bake for 30-40 minutes.