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Grilled Flatfish With Pistachio-Herb Sauce

This grilled flatfish with pistachio-herb sauce is a sophisticated yet simple way to enjoy fresh seafood. Whether you choose sole, flounder, or turbot, the delicate white flesh is perfectly complemented by a vibrant, chunky salsa-style sauce. A clever combination of chopped prunes and pistachios provides a unique balance of sweetness and crunch, while fermentation liquid from kimchi or sauerkraut adds a hidden depth of acidity that elevates the entire dish.

As a naturally dairy-free main course, this recipe is ideal for light summer dining or a healthy weekend dinner. The fish is grilled in steaks to ensure the succulent flesh stays moist while the skin becomes beautifully crisp. Serve it simply with some steamed new potatoes or a crisp green salad to let the aromatic herbs and zesty vinegar dressing really shine.

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Ingredients for Grilled Flatfish With Pistachio-Herb Sauce

  • 60ml raw pistachios

  • 10 prunes, pits removed, coarsely chopped

  • 1 garlic clove, finely grated

  • 300g finely chopped parsley

  • 240ml finely chopped mint

  • 60ml finely chopped tarragon

  • 60ml kimchi or sauerkraut brine

  • 2 tablespoons Champagne vinegar or white wine vinegar

  • Kosher salt

  • 180ml extra-virgin olive oil

  • 1 (2–4-lb.) flatfish (such as sole, flounder, or turbot)

  • Extra-virgin olive oil

  • Kosher salt

  • Aleppo-style pepper

How to make Grilled Flatfish With Pistachio-Herb Sauce

Toast pistachios in a dry small skillet over medium-low heat, tossing occasionally, until browned in spots, about 5 minutes. Let cool, then finely chop.

Gently mix pistachios, prunes, garlic, parsley, mint, tarragon, kimchi brine, and vinegar in a medium bowl to combine; season with salt. Whisk in oil, then taste and season spoon sauce with more salt if needed.

Prepare a grill for medium heat. Using a chef’s knife, cleaver, or serrated knife, cut fish crosswise into 2"–4"-wide planks (the larger the fish, the wider the planks); halve planks if fish is large. Pat fish dry, rub all over with oil, and season with salt and Aleppo-style pepper. Grill fish, undisturbed, until about 70 percent cooked through (use a knife to slide into flesh to check), about 5 minutes. The skin should release easily from the grate when the fish is ready to turn. If it’s sticking, keep cooking.

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

Transfer fish to a platter and spoon sauce over.

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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