Cod mornay is a much-maligned dish thanks to the ghastly "TV Dinner" versions, but this classic French dish of fish baked in a bechamel-based cheese sauce is simply stunning!
Course Main Course
Cuisine French
Keyword cod mornay, cod mornay with spinach, fish mornay, mornay sauce for fish
Heat a small 15-20cm (6-8") frying pan over a medium-high heat, and when it is hot, add the oil for the breadcrumbs.Pour in the dried breadcrumbs and cook until golden. This will take 5-8 minutes, then transfer to some kitchen paper to absorb any excess oil. Then set aside.
Heat a 20cm or 8" saucepan over a medium heat and melt the butter for the spinach.Throw in the spinach and salt and stir continuously until the spinach has wilted; this will take 5 or 6 minutes. Then transfer to a sieve and allow to drain whilst you cook the mornay sauce.
Heat a 15cm or 6" saucepan over a medium-low heat and add the butter for the mornay sauce.Add the flour and stir for 2-3 minutes until the flour cooks out and forms a thick "paste" with the butter.
Add the milk little by little until you have a smooth and lump-free white sauce; this will take 8-10 minutes.
Turn the heat down to very low and add the cheese and stir until the cheese has melted and you have a very smooth sauce.
Add the mustard, salt and white pepper, stir again and set aside for a moment.
Squeeze out any moisture from the spinach and arrange two piles about the same size as the cod in a 25x17x5cm (10x7x2″) baking dish.Season the cod with a little salt and place it on top of the spinach.
Pour over the cheese sauce, then sprinkle the breadcrumbs. I prefer to do this just over the fish.
Transfer to the oven and cook at 180°C or 350°F for 25-30 minutes (less if you are using cod fillet). You want an internal temperature in the centre of the fish of around 60-63°C (140-145°F). It is best to allow the dish to rest for 2-3 minutes before plating.