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Grilled flatfish with pistachio-herb sauce recipe

Grilled flatfish with pistachio-herb sauce is a heart-healthy dish that beautifully showcases the delicate flavours of fresh fish. The vibrant sauce, made from a blend of raw pistachios, fresh herbs like parsley, mint, and tarragon, and a hint of garlic, adds a deliciously nutty and fragrant twist. This dish is not only visually appealing but also perfect for those looking to enjoy a light yet satisfying meal.

Ideal for a family dinner or a special occasion, this recipe highlights the health benefits of omega-3 fatty acids found in flatfish and the nutritional boost from the herbs and nuts. Serve it alongside a crisp salad or some lightly steamed vegetables for a balanced meal that’s both nutritious and full of flavour.

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Ingredients for Grilled flatfish with pistachio-herb sauce

  • 30 g raw pistachios

  • 10 prunes, pits removed, coarsely chopped

  • 1 garlic clove, finely grated

  • 60 g finely chopped parsley

  • 30 g finely chopped mint

  • 15 g finely chopped tarragon

  • 60 ml kimchi or sauerkraut brine

  • 30 ml Champagne vinegar or white wine vinegar

  • salt (to taste)

  • 170 ml extra-virgin olive oil

  • 1 flatfish (about 900–1800 g), such as sole, flounder, or turbot

  • extra-virgin olive oil (for drizzling)

  • salt (to taste)

  • Aleppo-style pepper

How to make Grilled flatfish with pistachio-herb sauce

  1. Toast the pistachios in a dry frying pan over medium-low heat, tossing occasionally, until browned in spots, about 5 minutes. Let them cool, then finely chop.

  2. In a medium bowl, gently mix the chopped pistachios, prunes, garlic, parsley, mint, tarragon, kimchi brine, and vinegar until well combined; season with salt. Whisk in the oil, then taste the sauce and adjust the seasoning with more salt if needed.

  3. Prepare the grill for medium heat. Using a sharp knife, cut the fish crosswise into 5–10 cm wide planks (the larger the fish, the wider the planks); halve the planks if the fish is particularly large.

  4. Pat the fish dry, rub it all over with oil, and season with salt and Aleppo-style pepper. Grill the fish undisturbed until about 70% cooked through, which should take about 5 minutes; check by sliding a knife into the flesh. The skin should release easily from the grill when the fish is ready to turn; if it’s sticking, keep cooking.

  5. Using a large fish spatula, carefully turn the fish over and grill until cooked through, about 2 minutes (the fish is done when a paring knife easily pierces the flesh along the side).

  6. Transfer the fish to a platter and spoon the prepared sauce over the top.

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.

  • 7 Aug 2025 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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