Butternut Squash and Mackerel Pie

Also part of my food-in-film series, this pie is inspired by the one featured in Kiki’s Delivery Service. According to the internet, the original is pumpkin and herring, but since those aren’t always accessible, I swapped in butternut squash and mackerel. I was a bit hesitant about the flavour combo, but I was very pleasantly surprised. It’s now one of my favourite pies—perfect for chilly days and utterly blissful to eat.

Butternut Squash and Mackerel Pie
Butternut Squash and Mackerel Pie

Serves 4

Hands-on Time 30 minutes

Cooking Time 1 hour 50 minutes

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Ingredients

  • 1 butternut squash

  • Olive oil (for drizzling and frying)

  • Fine salt

  • Black pepper

  • 1 onion

  • 1 garlic clove

  • 75g chestnut mushrooms

  • 40g butter (plus 2 knobs)

  • 4 mackerel fillets

  • 50g plain flour (plus extra for dusting)

  • 400ml milk

  • 1/2 portion rough puff pastry or 300g ready-made puff pastry

  • 1 egg (for egg wash)

  • 12 black olives (pitted)

Equipment

  • Baking tray

  • Baking parchment

  • Knife

  • Chopping board

  • Spatula

  • Frying pan

  • 3 bowls

  • Potato masher

  • Oven-proof dish

  • Rolling pin

  • Small bowl

  • Pastry brush

Method

1. Roast the butternut squash

  • Preheat the oven to 190°C/170°C (fan)/375°F/Gas Mark 5.

  • Peel, deseed, and cube the butternut squash into 2cm pieces.

  • Place the cubes on a lined baking tray, drizzle with olive oil, and season with salt and pepper.

  • Bake for 60 minutes, turning halfway, until tender and golden.

2. Prepare the filling

  • Thinly slice the onion, garlic, and mushrooms.

  • Heat a knob of butter and a glug of oil in a frying pan. Cook the onion for 4 minutes, then add the garlic and cook for 1 more minute. Transfer to a bowl.

  • Add another knob of butter and a glug of oil to the pan. Cook the mushrooms for 5 minutes, seasoning with salt and pepper. Transfer to a separate bowl.

  • Heat a glug of oil in the pan. Cook the mackerel fillets skin-side down for 4 minutes, then flip and cook for another 4 minutes. Transfer to a bowl to cool, then flake the fish, discarding the skin.

3. Make the sauce

  • In the same pan, melt 40g butter and stir in 50g flour to form a paste. Cook for 2 minutes, then gradually whisk in the milk. Stir for 5 minutes until thickened. Season with salt and pepper.

  • Combine the sauce with the flaked fish and mushrooms.

4. Assemble the pie

  • Mash the roasted squash in a bowl and season with salt and pepper. Spread it evenly in an oven-proof dish.

  • Layer the cooked onions over the squash, followed by the fish and mushroom mixture.

5. Top with pastry

  • Roll out the pastry on a floured surface to fit the dish, leaving extra for decorations.

  • Place the pastry over the filling, trimming and sealing the edges. Use excess pastry to create decorations (e.g., lattice or fish shapes).

  • Beat the egg and brush it over the pastry to glaze and secure decorations.

  • Dot the olives around the edge of the pie.

6. Bake the pie

  • Bake on the middle shelf for 25 minutes, or until the pastry is golden.

  • Let the pie rest for a few minutes before serving.

Enjoy!

Butternut Squash and Mackerel Pie
Butternut Squash and Mackerel Pie