A Classic British Fish Pie for Cold Evenings

There is a particular kind of cold that only the coast produces. It comes in off the water sideways, finds the gap under the back door, and settles into the bones somewhere around four o'clock. On evenings like that, nobody wants a plate of something clever. They want a fish pie — soft, steaming, faintly smoky, with a golden mash crust that cracks under the spoon and releases a cloud of dill-scented steam. It is the most comforting thing you can do with a bag of fish, and it is forgiving enough to make on a weekday while the wind rattles the windows.

Why a Fish Pie Suits a Blustery Evening

Fish pie asks for very little of you. There is one pan for the sauce, one pan for the potatoes, and one dish at the end — no last-minute frying, no juggling. You can build it in the afternoon and slide it into the oven when the light goes. It also stretches good fish a long way: a modest amount of smoked haddock and salmon will feed four comfortably once it is under a blanket of mash.

It is also pleasingly adaptable to whatever your local fishmonger has. If the boats have been in, buy fresh. If they haven’t, a bag of frozen prawns and a couple of vacuum-packed fillets will still make a very good supper. Fish pies reward resourcefulness rather than perfection.

Choosing Your Fish — and Getting the Ratios Right

Aim for roughly 700g of fish for four to six people, and keep the smoked element to under half so it doesn’t overpower everything else. Cut everything into generous 3cm chunks and leave it raw; it will poach gently in the sauce in the oven.

• 300g undyed smoked haddock — the backbone of the dish. Ask for it skinned and boned.
• 250g salmon fillet — skin removed. Its richness balances the smoke.
• 150g raw king prawns — defrosted and patted bone dry if frozen, or swap for a handful of cooked brown shrimp stirred in at the last moment.
• 3 hard-boiled eggs, quartered — traditional, and still the right call.

Cod, pollack, hake or coley all work beautifully in place of the salmon. What you want to avoid is a single, dry, flaky white fish on its own; the mix of textures is half the pleasure.

The Sauce Is Where the Pie Is Won

Everything hinges on the white sauce. Make it properly and the pie is excellent; rush it and you will be eating fish in hot milk.

Warm 600ml whole milk with a bay leaf, half an onion, a few black peppercorns and a strip of lemon zest. Leave it to infuse for ten minutes, then strain. In a separate pan, melt 50g butter, whisk in 50g plain flour and cook the roux gently for two minutes — it should smell biscuity, not raw. Add the warm milk a ladleful at a time, whisking until each addition disappears, then simmer for five minutes until glossy.

Off the heat, stir through 100g crème fraîche or double cream, 75g grated mature Cheddar, a teaspoon of Dijon mustard, a good squeeze of lemon juice and plenty of chopped dill and flat-leaf parsley. Grate in a little nutmeg and season with white pepper. Go easy on salt — smoked fish and cheese have plenty already.

The sauce should be thicker than seems sensible. Fish releases a lot of liquid as it cooks, and a slack sauce makes a soupy pie. It should hold its shape on the back of a spoon.

A Mash Topping Worth the Effort

Use 1.2kg of floury potatoes — Maris Piper, King Edward or Rooster. Peel, cut into even chunks and boil in well-salted water until a knife slides in with no resistance. Drain, then leave them in the colander over the empty pan for five minutes to steam dry. This one step is the difference between fluffy mash and wallpaper paste.

Rice or mash them with 75g butter and about 100ml warm milk, adding it gradually. Stop as soon as it is smooth; overworking floury potatoes makes them gluey. Season generously with white pepper and a little nutmeg.

Tip the fish, prawns and eggs into a 2-litre ovenproof dish, pour over the sauce and fold gently. Spoon the mash on top and spread it right to the edges to seal the filling in. Drag a fork across the surface in rough waves, scatter over a little extra cheese, and dot with butter. Those ridges are what give you the crisp, bronzed peaks.

Bake at 200°C (180°C fan, gas 6) for 25 to 30 minutes, then flash under a hot grill for three or four minutes until the top is properly golden. Let it stand for ten minutes before serving — it will be molten straight from the oven.

Make It Ahead, Freeze It, and What to Serve Alongside

This is a dish built for planning. Assemble it completely, cool it quickly, cover with cling film and chill for up to 24 hours. Bake from cold at 180°C for 40 to 45 minutes, covering with foil for the first half so the top doesn’t catch.

• To freeze: freeze unbaked for up to a month, then defrost overnight in the fridge before baking.
• Greens: buttered spring greens, purple sprouting broccoli or simply a bowl of peas with mint.
• On the side: crusty bread to mop up, and a spoonful of pickled beetroot or a sharp watercress salad to cut the richness.
• To drink: a dry Chablis, an unoaked Chardonnay, or a chilled dry cider if you are being properly coastal about it.

A Few Variations Worth Keeping

Once you have the method, it belongs to you. Soften a couple of sliced leeks in the butter before making the roux and fold them through the sauce. Swap a third of the potato for celeriac for a lighter, nuttier topping. A teaspoon of mild curry powder whisked into the roux gives you the smoked haddock version beloved of Scottish cooks — gentle, warm and oddly perfect on a wet night.

And if there is any left, it reheats beautifully the next day in a low oven. Some argue it is even better then, eaten with a fork straight from the dish while the rain comes in off the sea.