Slow-cooked halibut with garlic cream and fennel recipe
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 30 Mar 2025
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This high-protein slow-cooked halibut with garlic cream and fennel is a luxurious dish that elevates any dining experience. The tender halibut, infused with the aromatic notes of garlic and the aniseed flavour of fennel, is gently cooked to perfection, resulting in a melt-in-the-mouth texture. The rich double cream adds a velvety finish, making this dish both indulgent and satisfying.
Ideal for a special family dinner or an intimate gathering, this recipe is a fantastic way to serve fish while ensuring a generous protein boost. Paired with a fresh lemon squeeze and a drizzle of extra-virgin olive oil, it offers a beautiful balance of flavours. Serve it alongside sautéed greens or crusty bread for a complete meal that feels both comforting and elegant.
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Ingredients for Slow-cooked halibut with garlic cream and fennel
2 small fennel bulbs, cut into 1.5 cm-thick wedges, fronds reserved
8 garlic cloves, thinly sliced
960 ml double cream
30 g kosher salt, divided; plus more
675 g skin-on halibut fillet, patted dry
1 small lemon
120 ml extra-virgin olive oil
freshly ground black pepper
How to make Slow-cooked halibut with garlic cream and fennel
Preheat the oven to 120°C (fan) / 130°C (conventional).
Place the fennel in a large saucepan that is wide enough to accommodate the fish comfortably.
Add the garlic, cream, and 15 g (1 tablespoon plus 2 teaspoons) of salt to the saucepan.
Set the heat to low and cook, stirring occasionally, until the fennel is just tender, about 12–15 minutes. Do not allow the cream to boil.
Remove the saucepan from the heat.
Season the fish with the remaining 5 g (1 teaspoon) of salt.
Using tongs, carefully lower the fish into the pan, ensuring it is mostly covered by the fennel and cream mixture.
Transfer the saucepan to the oven and cook the fish, uncovered, until the flesh easily flakes with a fork, approximately 18–22 minutes.
While the fish is cooking, finely chop the reserved fennel fronds and place them in a small bowl (you should have about 120 ml).
Cut off the ends of the lemon and discard them.
Stand the lemon upright on one end and cut it into four lobes, working around the centre and leaving the core and seeds behind.
Finely chop the lemon lobes (peel and all) and add them to the bowl with the fennel fronds (you should have about 80 ml).
Squeeze the juice from the core over the fennel fronds and discard the core.
Drizzle in oil and toss the mixture to combine.
Season the fennel oil with salt and plenty of pepper.
Break the cooked fish into large pieces and divide them among shallow bowls.
Distribute the garlic and fennel evenly among the bowls, then ladle some garlic cream on top.
Spoon the fennel oil over each serving.
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.
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Article history
The information on this page is peer reviewed by qualified clinicians.
30 Mar 2025 | Originally published
Authored by:
UK recipe editors
Peer reviewed by
UK recipe editors

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