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Mackerel with Cauliflower "Couscous" and Tahini

This vibrant mackerel with cauliflower couscous and tahini is a wonderful way to enjoy fresh, oily fish. By quickly frying then pulsing the cauliflower, you create a grain-free base that perfectly absorbs the creamy, zesty tahini dressing and sweet pomegranate jewels. The addition of toasted pumpkin, sesame, and nigella seeds provides an aromatic crunch that elevates this simple dish into something truly special.

As a diabetes-friendly meal, this recipe is naturally low in carbohydrates and rich in heart-healthy omega-3 fatty acids. It makes for an elegant light lunch or a nutritious midweek dinner that feels indulgent without being heavy. The combination of warm grilled mackerel and chilled, citrusy cauliflower provides a beautiful contrast in both temperature and texture for a satisfying, wholesome plate.

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Ingredients for Mackerel with Cauliflower "Couscous" and Tahini

  • 1 garlic clove, finely grated

  • 60ml tahini

  • 2 tablespoons fresh lemon juice

  • 2 tablespoons olive oil

  • Kosher salt

  • 45ml olive oil, divided

  • 1 small head cauliflower, cored, cut into large florets

  • 1 tablespoon fresh lemon juice

  • Kosher salt

  • 2 tablespoons raw pumpkin seeds

  • 2 teaspoons sesame seeds

  • 1 teaspoon nigella seeds

  • 2 whole small Spanish mackerel (about 450g each), cleaned

  • 1 tablespoon olive oil

  • Kosher salt

  • 1 lemon, thinly sliced, seeds removed

  • 1 bunch thyme

  • 1/2 cup pomegranate seeds

  • 1/2 cup fresh coriander leaves with tender stems

  • Nigella seeds are available at Indian markets or online. Tahini sauce Stir garlic, tahini, lemon juice, oil, and 60ml water in a small bowl

  • season with salt.

How to make Mackerel with Cauliflower "Couscous" and Tahini

Heat 2 tablespoons oil in a large heavy skillet over mediumhigh. Working in batches if needed, cook cauliflower, tossing occasionally, until florets are browned in spots but still crunchy, about 5 minutes. Transfer to a large bowl and let cool. Reserve skillet.

Working in 2 batches, pulse cauliflower in a food processor until the size of rice grains. Transfer back to bowl, toss with lemon juice, and season with salt.

Cook pumpkin seeds and remaining 1 tablespoon oil in reserved skillet over medium heat, stirring, until seeds are golden brown, about 1 minute. Season with salt. Toss in a small bowl with sesame and nigella seeds.

Heat grill. Place fish on a rimmed baking sheet and rub with oil; season all over with salt. Stuff cavity with lemon and thyme. Grill, turning once, until cooked through, 10–12 minutes. Let rest 5 minutes.

Spoon cauliflower onto plates; drizzle with tahini sauce. Top with seed mixture and pomegranate seeds. Remove fillets from fish and place, skin side up, on top. Add coriander and a sprinkle of salt.

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.

  • 16 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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