Mary Berry isn’t afraid ... After cooking off her leeks and forming a roux, she seasons the sauce and adds fish to it. Then, she spoons the pie base into a casserole dish with some hard-boiled ...

Mary Berry’s fish pie recipe Ingredients 350g un-dyed skinned smoked haddock fillet 350g skinned haddock fillet Two leeks, sliced 50g butter 50g flour 600ml (one pint) hot milk Salt and pepper ...

It goes on to praise the filling too, stating that "The vegetarian cheese and potato pie filling is also delicious and simple to make." READ MORE: Mary Berry's easy chicken and leek casserole ...

For the fish filling, melt the butter in a saucepan, add the leeks and stir over the heat. Cover with a lid and simmer gently for 10 minutes, or until soft. Measure the flour into a small bowl.