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Cedar-Planked Char with Wood-Grilled Onions

This elegant cedar-planked char with wood-grilled onions is a masterclass in outdoor cooking, offering a delicate smoky depth that perfectly complements the rich, buttery flavour of the fish. By slow-cooking the Arctic char on cedar wood, the flesh remains incredibly moist while absorbing the aromatic essence of fresh tarragon, dill, and parsley. The addition of charred lemons and sweet red onions provides a bright, savoury balance that elevates the entire dish.

As a diabetes-friendly main course, this recipe is naturally low in carbohydrates and rich in heart-healthy omega-3 fatty acids. It is an excellent choice for a healthy weekend lunch or a sophisticated dinner party during the summer months. Serving the fish directly from the grill alongside the caramelised onions ensures a rustic yet refined presentation that your guests will certainly appreciate.

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Ingredients for Cedar-Planked Char with Wood-Grilled Onions

  • 4 whole Arctic char (about 450g each), cleaned

  • 8 sprigs fresh tarragon

  • 8 sprigs fresh dill

  • 8 sprigs fresh flat-leaf parsley

  • 8 stems fresh chives

  • Salt and freshly ground white pepper

  • Olive oil for brushing

  • 4 lemons, halved

  • 4 medium-size red onions, peeled and halved

How to make Cedar-Planked Char with Wood-Grilled Onions

  1. Prepare an indirect fire in your grill with a hot fire on one side and no fire on the other. For a charcoal grill, soak 240ml wood chips or corncobs in water for at least 30 minutes and place directly on the hot coals when ready to plank. For a gas grill, place 120ml dry wood chips or corncobs in a smoker box (or wrap chips in aluminum foil and poke holes in the foil) and place over direct heat in the back of the grill.

  2. In the cavity of each fish, place 2 sprigs each of tarragon, dill, and parsley, and 2 stems of chives. Season with salt and pepper. Place 2 fish on each plank.

  3. Brush the cut sides of the lemons and onions with olive oil.

  4. When you see the first wisp of smoke, place the planks on the indirect side of the grill. Set the onion and lemon halves, cut side down, directly on the grate over the fire and close the lid.

  5. Check the lemons after 2 or 3 minutes. If they have nice grill marks, remove them from the grill. The onions will take an additional 10 to 15 minutes and may be turned after the first 10 to 12 minutes. When they are nicely charred, remove them from the grill, too. Close the lid and continue to cook the fish until it is opaque and begins to flake when tested with a fork, 45 to 60 minutes total.

  6. Fillet the char and serve on a platter with the lemon and onion halves.

Oven Smoke-Planking: Preheat the oven to 204°C. Place 60g dry wood chips or corncobs in a small metal pan on the bottom rack of the oven and let smolder for about 15 minutes before planking. Place the herb-stuffed planked fish in the middle of the oven. Oven smoke-plank for 45 to 60 minutes, or until the fish is opaque and begins to flake when tested with a fork. Garnish with lemon wedges. (Omit the onions.)

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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