Three Fish Pie

Name: Three Fish Pie
Prep time: 12 min
Cook time: 23 min
Total time: 35 min
Yield: 4 servings
Cuisine: British
Ingredients: 1kg Potatoes; Knob Butter; Dash Milk; 50g Gruyere; 75g Butter; 2 sliced Leek; 75g Plain Flour; 150ml White Wine; 568ml Milk; 2 tbs chopped Parsley; 250g Salmon; 250g Haddock; 250g Smoked Haddock; 6 Eggs

By The Spice & Simmer Kitchen · Published May 3, 2026

A one-pot Seafood recipe with British flavors, built for busy weeknights when you want real food without a sink full of dishes. Comes together in roughly 55 minutes, serves about 4, and uses ingredients you can find at any normal grocery store. The technique is simple: build a base in your pot, layer in the main ingredients, simmer until everything has had time to talk to each other, and serve straight from the pan. If you're cooking for picky eaters, this one tends to land — the flavors are recognizable, the texture is comforting, and there's nothing weird hiding in the ingredient list. Perfect for the kind of evening where you want dinner on the table by 7pm and the kitchen empty by 7:30.

Ingredients

Makes 4 servings · 35 min total

1kg Potatoes
Knob Butter
Dash Milk
50g Gruyere
75g Butter
2 sliced Leek
75g Plain Flour
150ml White Wine
568ml Milk
2 tbs chopped Parsley
250g Salmon
250g Haddock
250g Smoked Haddock
6 Eggs

Step-by-step instructions

Preheat the oven to 200C/400F/Gas 6 (180C fan).
Put the potatoes into a saucepan of cold salted water. Bring up to the boil and simmer until completely tender. Drain well and then mash with the butter and milk. Add pepper and taste to check the seasoning. Add salt and more pepper if necessary.
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. Add the wine and whisk together until smooth.
Add the milk to the leeks, bring to the boil and then add the wine mixture. Stir briskly until thickened. Season and add the parsley and fish. Stir over the heat for two minutes, then spoon into an ovenproof casserole. Scatter over the eggs. Allow to cool until firm.
Spoon the mashed potatoes over the fish mixture and mark with a fork. Sprinkle with cheese.
Bake for 30-40 minutes, or until lightly golden-brown on top and bubbling around the edges.

Why this works on a weeknight

Three Fish Pie lands at about 35 minutes total — a little longer than our 30-minute target, but most of that time is hands-off simmering, which is why it earned a spot in our Skillet & One-Pan collection. The technique is forgiving, the ingredient list is grocery-store standard, and the active cooking time is short enough that you can answer a text message in the middle without ruining dinner.

Cleanup notes

This is a single-pan recipe, so the cleanup is exactly one pan, one cutting board, and one knife. While the dish rests, fill the pan with hot soapy water — by the time you are done eating, the residue lifts off with a single pass of a sponge. Skip the steel wool on cast iron; a stiff brush and warm water are all you need to keep the seasoning intact.

Make-ahead and leftovers

Leftovers keep covered in the fridge for up to three days. Reheat in a dry pan over medium-low with a splash of water or stock to loosen the sauce. Three Fish Pie actually improves overnight as the flavors keep talking to each other, so doubling the recipe and packing tomorrow's lunch is a high-leverage weeknight move.

Filed under 🥘 Skillet & One-Pan Seafood British Fish Seafood Dairy Pie