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Slow Cooker Fish Pie

If you're looking for a way to get the whole family enjoying more fish in their diet it really doesn't get easier than this slow cooker fish pie.
Prep Time20 mins
Course: Main Course
Cuisine: British
Keyword: fish, slow cooker
Servings: 4 people


  • Spray oil
  • 1 leek thinly sliced
  • 50 g butter
  • 50 g plain flour
  • 450 ml milk
  • 150 ml fish or chicken stock
  • 75 g cheese
  • 1 bay leaf
  • 800 g mixed fish – salmon smoked haddock, unsmoked haddock etc skinned and cubed

For the Topping:

  • 800 g mashed potato made with milk and butter. However, you can make slimline mash with just skimmed milk if you’d prefer.


  • Spray a large saucepan with oil and fry the leeks until softened. Transfer to a plate and continue with the next steps.
  • Add the butter, flour and milk to the saucepan and bring to the boil while whisking constantly until thickened and smooth. Stir in the stock, cheese and bay leaf.
  • Put the fish in an even layer in the slow cooker pot and pour over the sauce. Cover and cook on low for 2-3 hours.
  • Spoon the fish mixture into an ovenproof dish. Top with mashed potato and sprinkle with the cheese and brown in the oven until golden.