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Grilled swordfish with charred leeks and citrus glaze

Grilled swordfish with charred leeks and citrus is a delightful high-protein dish that highlights the robust flavours of fresh ingredients. The meaty texture of the swordfish pairs beautifully with the smoky notes of charred leeks, while the bright citrus from the oranges adds a refreshing zing. Drizzled with a tangy dressing made from olive oil, white wine vinegar, and green olives, this dish is not only satisfying but also vibrant, making it perfect for those looking to elevate their weeknight dinners.

Ideal for a family gathering or a special occasion, this recipe is both easy to prepare and packed with protein, ensuring that it keeps everyone feeling full and energised. Serve it alongside a crisp salad or some roasted vegetables for a well-rounded meal that celebrates the season's best produce, making it a nutritious choice for health-conscious diners.

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Ingredients for Grilled swordfish with charred leeks and citrus

  • 4 medium leeks, trimmed, washed

  • 300 g green olives

  • 15 g fresh dill, coarsely chopped

  • 45 ml white wine vinegar

  • kosher salt, to taste

  • 75 ml extra-virgin olive oil, divided, plus more

  • 3 oranges, juiced and zested

  • 1.4 kg swordfish steaks, about 4 (2.5 cm thick)

  • freshly ground black pepper, to taste

How to make Grilled swordfish with charred leeks and citrus

  1. Preheat the grill to a high heat.

  2. Trim the dark green parts from the leeks and remove any tough outer layers. Rinse the leeks to remove any sand and dirt, then pat them dry.

  3. Place the leeks directly on the grill (no oil needed) and grill, turning every few minutes with tongs, until the outer layer is completely blackened and they start to soften, about 10–12 minutes. Transfer the leeks to a platter and allow them to cool, which will also help steam them and make the insides tender.

  4. Reduce the grill heat to medium-high.

  5. Meanwhile, use the side of a chef’s knife to smash open the olives and remove the pits, ensuring the flesh stays in large pieces. Transfer the olives to a medium bowl.

  6. Cut the cooled leeks into 1.5 cm thick rounds (including the charred parts) and add them to the bowl with the olives. Stir in the dill, vinegar, a generous pinch of salt, and 45 ml of oil; toss to combine.

  7. Using a sharp paring knife, remove the peel and white pith from the oranges and discard. Slice the oranges crosswise into 0.5 cm thick rounds and set aside for serving.

  8. Clean and oil the grill grate, then rub the swordfish steaks with 30 ml of oil and season with salt. Grill the steaks until they are lightly charred and just cooked through, about 5–7 minutes per side (the fish should feel firm when gently pressed).

  9. Divide the swordfish among plates and arrange the reserved sliced oranges around them. Spoon the leek mixture and any juices from the bowl over the fish. Drizzle with more oil and season with pepper before 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.

  • 6 Oct 2025 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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