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Roast Side of Salmon with Mustard, Tarragon, and Chive Sauce

Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 16 Jan 2026

Meets Patient’s editorial guidelines

This roast side of salmon with mustard, tarragon, and chive sauce is a sophisticated yet deceptively simple centrepiece. Combining the punchy heat of brown mustard with the aromatic sweetness of fresh tarragon and chives, the glaze creates a vibrant crust that keeps the fish incredibly succulent. It is a fantastic choice for a celebratory lunch or a light dinner, offering a beautiful balance of rich omega-3 fatty acids and bright, zesty citrus flavours.

As a heart-healthy main course, this dish focuses on high-quality protein and fresh herbs rather than heavy fats. The salmon side cooks remarkably quickly at a high temperature, ensuring a tender finish every time. Serve it alongside some steamed seasonal greens and crushed new potatoes for a balanced, nutritious meal that feels truly indulgent without the fuss.

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Ingredients for Roast Side of Salmon with Mustard, Tarragon, and Chive Sauce

  • 160ml mayonnaise

  • 120ml spicy brown mustard (such as Gulden's)

  • 90ml chopped fresh tarragon

  • 90ml chopped fresh chives

  • 2 tablespoons (packed) golden brown sugar

  • 2 tablespoons fresh lemon juice

  • 2 teaspoons finely grated lemon peel

  • 1 3 1/2-to 1.7kg whole side of salmon with skin (about 1 1/2 inches thick at thickest part)

How to make Roast Side of Salmon with Mustard, Tarragon, and Chive Sauce

Position rack in centre of oven and preheat to 232°C. Line large rimmed baking sheet with parchment paper. Mix first 7 ingredients in medium bowl. Season mustard sauce lightly with salt and generously with pepper. Place salmon, skin side down, on diagonal on prepared sheet. Spoon 120ml mustard sauce atop salmon, then spread over, covering completely. Sprinkle salmon generously with salt and pepper. Roast just until salmon is opaque in centre, about 15 minutes. Using parchment as aid, transfer salmon to platter. Cut crosswise into pieces and serve with remaining mustard sauce.

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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