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Slow-Roasted Salmon in Parchment Paper

This slow-roasted salmon in parchment is a sophisticated yet simple heart-healthy dish that relies on gentle heat to produce perfectly flakey, moist fish. By cooking the fillets 'en papillote' with a savoury-sweet mixture of Castelvetrano olives, capers and rum-soaked raisins, the flavours intensify while the steam keeps the salmon tender. The addition of fresh lime and coriander provides a bright, citrus finish that balances the richness of the Mediterranean-inspired sauce.

Ideal for a nutritious mid-week dinner or a relaxed weekend lunch, this homemade salmon recipe is naturally high in omega-3 fatty acids and low in saturated fats. The parcels can be assembled in advance, making it an excellent choice for stress-free entertaining. Serve these elegant steamed packets with crushed new potatoes or a crisp green salad to soak up the delicious juices.

Continue reading below

Ingredients for Slow-Roasted Salmon in Parchment Paper

  • 2 tablespoons extra-virgin olive oil, plus more for drizzling

  • 1 onion, thinly sliced

  • 1 bay leaf

  • Kosher salt

  • 240ml Castelvetrano olives, pitted, quartered

  • 40g drained capers

  • 40g raisins

  • 90ml dark rum

  • 2 tablespoons fresh lime juice

  • 4 (170g) salmon fillets, patted dry

  • Freshly ground black pepper

  • 60ml coarsely chopped coriander, divided, plus more for serving

  • Lime wedges (for serving)

How to make Slow-Roasted Salmon in Parchment Paper

Preheat oven to 135°C. Heat 2 tablespoons oil in a large skillet over medium-low. Add onion, bay leaf, and a pinch of salt and cook, stirring often and reducing heat if onion is browning too fast, until onion is golden brown, 25–30 minutes.

Add olives, capers, raisins, and 2 tablespoons water to skillet and cook, stirring occasionally, until olives are softened, about 4 minutes. Add rum and cook until liquid is evaporated, about 5 minutes. Remove skillet from heat and stir in lime juice and 1 tablespoon water. If needed, add a splash or two more of water so mixture is saucy; season with salt.

Season salmon with salt and pepper. Cut four large sheets of parchment paper. Working with 1 sheet, spoon one-quarter of sauce onto the centre of paper; scatter 1 tablespoon coriander over. Create a well in the sauce the size of a salmon fillet and place fish in well; drizzle with oil. Gather edges of parchment up and over salmon and tie tightly closed with kitchen twine. Set on a rimmed baking sheet. Repeat with remaining parchment paper, sauce, salmon, and 45ml coriander.

Bake packets until salmon is cooked through, 20–22 minutes for medium (go 2 minutes longer for well-done). Remove from oven and let salmon steam in packets 2 minutes. Unwrap and top with more coriander. Serve with lime wedges for squeezing over.

Sauce can be made 2 days ahead. Let cool; cover and chill. Before using, add water to loosen if it looks tight.

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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