Warming Fish Pie with Crispy Topping

Warming Fish Pie with Crispy Topping

Everyone loves this classic fish pie: responsibly-sourced salmon and golden leeks in cashew cream. With a crisp mashed potato topping sprinkled with cashew 'parmesan'. Tender green beans on the side to up the veg. Simply a classic.

High protein 1/3 daily fibre Low sat fat

Serving size

Cook time: 35 mins
Cuisine: British
Food group: Fish
Allergens: Milk, Fish, Mustard
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Cooking Instructions

The protein cooking time listed in this recipe has been updated.

As of December 2025, we’ve revised cooking times for all our proteins to reflect improved food safety guidance.

Check out the latest recommended times in our Cooking Guidelines.

Before you start

  • Bring a medium saucepan filled with salted water to a boil
  • Pull out a sieve, a measuring jug, a grater, a masher, a large frying pan & a medium ovenproof dish

Make the mash

  • Peel and dice the potatoes into 2cm chunks, then add to the saucepan
  • Simmer for 15-18 mins, until soft, then drain
  • Return to the pan and mash with 1/2 tsp oil and a pinch of salt and pepper

Start the pie

  • Thinly slice the leek into 1/2cm thick half-moons. Rinse the spinach
  • Heat the large frying pan with 1/2 tsp oil on medium heat. Once hot, add the leek and cook for 4-5 mins, until softened. Season with salt and pepper
  • Meanwhile, dissolve the cornflour in the jug with 2 tbsp cold water (1 tbsp for 1 person), then add the stock powder and top up with 250ml hot water (125ml for 1 person)

Make the filling

  • To the leek pan, add the mustard, stock mixture and salmon. Bring to the boil, then lower the heat and simmer for 14 mins, until the fish is cooked and sauce has thickened
  • Meanwhile, roughly chop the parsley. Zest half the lemon, then slice in half
  • Stir the spinach, lemon zest, half the parsley and a squeeze of lemon juice into the fish. Simmer for 1 min, until wilted. Remove from the heat and stir in the yoghurt. Season to taste with salt and pepper

Time to grill

  • Preheat the grill to high (240C)
  • Transfer the mixture to the ovenproof dish. Top with the mash, then sprinkle over the nutritional yeast
  • Grill for 5-6 mins, until golden

Cook the green beans & plate up

  • Rinse the potato saucepan, fill with salted hot water and bring to a boil
  • Trim the green beans, then add to the saucepan. Boil for 2-3 mins, until cooked. Drain, then season with salt and pepper
  • Check your fish is cooked through; it should be steaming hot, opaque and separate easily with a fork
  • Share the fish pie between plates, with the green beans alongside. Garnish with the remaining lemon, cut into wedges. Sprinkle over the remaining parsley

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