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Halibut Pot Pie with Mashed Potato Crust

This elegant halibut pot pie offers a fresh take on a classic British comfort food. By using a light vegetable stock base enriched with sautéed fennel and shallots, the delicate flavour of the white fish is perfectly preserved rather than being masked by a heavy cream sauce. It is a sophisticated, savoury dish that provides a satisfyingly crisp topping without the need for traditional pastry.

As a high-protein meal, this recipe is ideal for those seeking a nutritious and filling dinner that does not compromise on taste. The addition of baby spinach provides a vibrant boost of greens, making it a well-balanced plate that works beautifully on its own. Serve this golden-topped fish pie piping hot for a wholesome midweek treat that the whole family will enjoy.

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Ingredients for Halibut Pot Pie with Mashed Potato Crust

  • 2 tablespoons (1/4 stick) butter

  • 1 large fennel bulb, trimmed, halved, thinly sliced crosswise (about 350g )

  • 60g sliced shallots (about 2 medium)

  • 2 tablespoons plain flour

  • 350ml vegetable broth

  • 675g halibut fillets, cut into 1-inch cubes

  • 1 170g package baby spinach

  • 3 1/2 cups warm mashed potatoes

How to make Halibut Pot Pie with Mashed Potato Crust

Preheat grill. Melt butter in heavy large saucepan over medium heat. Add fennel and shallots. Cover; cook until tender, stirring occasionally, about 8 minutes. Sprinkle with flour, salt, and pepper. sauté 2 minutes. Add broth; bring to boil, stirring often. Add fish and spinach. Cover; simmer over medium heat until fish is almost cooked through, about 4 minutes.

Transfer fish mixture to 11x7x2-inch baking dish. Spoon mashed potatoes over, covering completely. Grill until filling bubbles at edges and potatoes are brown in spots, about 4 minutes. Serve.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 17 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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