Fish Pie

Introduction

This fish pie layers poached salmon, smoked haddock, prawns, and mussels under a thick, creamy mashed potato topping, finished in a hot oven until golden. The fish poaches gently in milk infused with bay leaf, then that same milk gets worked into the potatoes to build a cohesive, fish-forward dish. It takes about an hour total and serves 4 as a substantial main course.

Recipe Details

• Prep Time: 15 minutes
• Cook Time: 55 minutes
• Total Time: 70 minutes
• Servings: 4

Ingredients

• 200 g of fresh salmon
• 200 g of smoked haddock
• 100 g prawns
• 100 g mussels
• 5 scallops
• 2 lb (1 kg) potatoes
• Nutmeg
• Butter
• ¼ pt (150 ml) fresh single cream
• 2 bay leaves
• milk
• 50 g Ementhaler or Appenzeller cheese, grated

Instructions

1. Take all the fish and place it all in a saucepan with sufficient milk so that the fish is submerged. Add the bay leaf and a pinch of salt.
2. Poach on a low heat for about 5 minutes
3. Remove the fish from the pan, skin the haddock and the salmon, and flake, using a fork, into pieces. Return to the milk and set aside.
4. Peel and boil the potatoes until they are soft enough to mash. This will take at least 20 minutes of boiling, otherwise the mash may remain lumpy. The potato needs to be mashed very well indeed, and an electric whisk is recommended after the initial crushing of the potatoes.
5. Pour some of the milk into the potatoes so that the taste of fish infuses into it. The mash should not get too runny, but add some of the cream and grate some nutmeg into the potato as well.
6. Put the cooked fish into the bottom of an oven-proof dish, with any remaining milk sauce. The dish should not be too large as it is nice to build a couple of layers of the fish, rather than lay it out in one layer. Once you have done this, pat the fish gently down a little so that it is slightly compacted.
7. Spread the mashed potato over the top of the fish to a height of about 1½ inches (38 mm) making sure it is flat, and not piled up in the middle. Using a fork, ridge the top of the potato as this will make it colour up nicely in the oven.
8. At this stage, if you want, add the grated cheese over the potato, and if you are feeling artistic, decorate the top of the pie with some large peeled prawns around the edge of the fish, and maybe a decoration in the middle.
9. Place the pie in the oven at 220°C and leave for about 30 minutes or so, until the top of the potato/grated cheese is nicely coloured and the potato is bubbling nicely.
10. Remove from the oven and serve immediately.

Variations

Smoked fish only: Use 400 g smoked haddock and skip the fresh salmon. The pie will have a more pronounced smoky character, and you can skip the poaching step entirely—just flake the smoked fish cold and layer it directly into the dish with a splash of milk.

Shellfish-heavy version: Increase the prawns to 150 g and add 150 g of cooked crab meat or lobster meat. Reduce the salmon to 100 g. This shifts the pie toward a shellfish focus, which pairs well with the creamy potato topping.

Root vegetable topping: Replace half the potato with boiled parsnip or celeriac, mashed together. This adds a subtle earthiness and slight sweetness that complements the delicate fish.

Herb mash: Stir 2 tablespoons of chopped fresh parsley or dill into the mashed potato before spreading it over the fish. This brightens the dish and adds a fresh finish.

Single cream swap: If you prefer a richer pie, use all cream instead of the milk-cream mixture. Reduce the total liquid by about one-quarter to keep the mash from becoming too loose.

Tips for Success

Mash thoroughly and use an electric whisk: Lumpy potato ruins the pie texture. Crush the potatoes by hand first, then use an electric whisk to beat them smooth, gradually adding the fish-infused milk and cream to reach the right consistency.

Don’t oversalt during poaching: The smoked haddock and fish cooking liquid are already salty. Taste the milk-flaked fish mixture before seasoning further, or you risk an overly salty pie.

Ridge the potato surface with a fork before baking: This creates ridges that brown and crisp in the oven, giving the top visual appeal and a slight textural contrast. A flat, smooth surface won’t color as attractively.

Watch the oven temperature closely in the final 10 minutes: The cheese and potato top can brown too quickly if your oven runs hot. Once the top is golden, pull it out immediately—overcooked potato becomes grainy.

Compact the fish layer gently: A loose fish layer will rise and separate from the potato during baking. Press it down lightly after spreading it into the dish, but don’t crush it into a dense mass.

Storage and Reheating

To reheat, place the pie in a 180°C oven, covered with foil, for 15–20 minutes until the center is hot. Alternatively, reheat portions in the microwave on medium power for 2–3 minutes, but the potato topping will not re-crisp. For best results, eat the pie warm on the day it is made or the following day cold as a solid slice.

FAQ

Can I use frozen fish instead of fresh? Yes, but thaw it completely and drain it well before poaching. Frozen fish releases more liquid during cooking, which can make the milk-based sauce watery. Pat the thawed fish with paper towels before adding it to the saucepan.

What if I don’t have fresh single cream? Use whole milk mixed with a small knob of butter, or use double cream diluted with a little milk. The single cream adds richness without making the mash too thick—adjust the ratio of milk to cream by eye as you mix the potatoes.

Can I assemble the pie a few hours ahead and bake it later? Yes. Assemble it completely, cover it with plastic wrap, and refrigerate for up to 8 hours. Bake from cold, adding 5–10 extra minutes to the oven time. The fish will cook through gently, and the potato will take longer to heat and brown.

Is there a way to make this lighter? Replace the single cream with half-fat crème fraîche or Greek yogurt added after the potatoes are off the heat. Use a little less butter when mashing. The pie will be slightly less rich, but still creamy and cohesive.