Swedish South Puget Sound Salmon with Creamy Dill Sauce

This Swedish South Puget Sound salmon is a Swedish-inspired dinner of roasted Pacific Northwest salmon, crisp potatoes, cucumber salad, and a cool mustard-dill sauce. It is not a traditional regional Swedish dish; rather, it brings familiar Swedish flavors to a South Puget Sound-style fish supper, with simple steps and ingredients that are easy to find.

Ingredients

1½ lb (680 g) small Yukon Gold or baby potatoes, scrubbed and cut into 1-inch (2.5 cm) pieces
1½ tbsp (22 ml) olive oil, divided
¾ tsp (4 g) fine salt, divided, plus more to taste
¼ tsp (0.5 g) freshly ground black pepper, divided, plus more to taste
4 salmon fillets, about 6 oz (170 g) each, pin bones removed and skin left on or off as preferred
½ cup (120 g) crème fraîche or sour cream
1 tbsp (15 g) Dijon mustard
1 tbsp (15 g) whole-grain mustard
2 tbsp (6 g) finely chopped fresh dill, plus a little extra for serving
1 tbsp (15 ml) lemon juice, plus 1 lemon cut into wedges for serving
1 tsp (7 g) honey
1 English cucumber, about 12 oz (340 g), thinly sliced
1 tbsp (15 ml) white wine vinegar or apple cider vinegar
1 tsp (4 g) granulated sugar
¼ small red onion, about 1 oz (28 g), very thinly sliced

Instructions

Heat the oven to 400°F (204°C). Put a rimmed baking sheet in the oven as it heats if you want especially browned potato edges. Cut the potatoes into roughly equal pieces so they cook at the same pace. Pat the salmon dry with paper towels and check for pin bones by running a clean fingertip along the center of each fillet; pull out any bones with clean tweezers.
Toss the potatoes with 1 tablespoon (15 ml) of the olive oil, ½ teaspoon (3 g) of the salt, and about half of the pepper. Carefully spread them on the hot baking sheet in one layer, cut sides against the pan where possible. Roast for 14 minutes. Starting the potatoes first gives them time to become tender and browned while the salmon cooks briefly at the end.
While the potatoes roast, stir together the crème fraîche, Dijon mustard, whole-grain mustard, chopped dill, lemon juice, honey, and a pinch of salt in a small bowl. Taste and adjust with a little more lemon for brightness or honey if the mustard tastes too sharp. Keep the sauce refrigerated if the kitchen is warm; it is served cool or just slightly chilled, not baked.
Make the cucumber salad in a separate bowl. Whisk the vinegar, sugar, remaining ½ tablespoon (7 ml) olive oil, and a pinch of salt until the sugar dissolves. Add the cucumber and red onion, toss well, and set aside for 10 to 15 minutes while the fish cooks. The brief rest softens the onion and seasons the cucumber without making it limp. Toss once more before serving.
After the potatoes have roasted for 14 minutes, turn them with a spatula and push them toward the edges of the pan. Rub the salmon with the remaining olive oil, then season with the remaining salt and pepper. Set the fillets skin-side down, if they have skin, in the open space on the pan. Return the pan to the oven and roast for 12 to 14 minutes, depending on thickness. Check the thickest part with a food thermometer; USDA FSIS lists 145°F (63°C) as the safe minimum internal temperature for fish. If a fillet has not reached that temperature, return it to the oven and check again after 1 to 2 minutes.
Take the pan from the oven and let the salmon rest for 2 minutes while you toss the potatoes and cucumber salad. Serve each portion with potatoes, cucumber salad, a generous spoonful of dill sauce, and a lemon wedge. Scatter on a little extra dill if desired. Keep the sauce on the side so everyone can choose how much to add.

Tips

Choose salmon fillets of similar thickness so they finish together. A thick center-cut piece may need a few extra minutes compared with a thin tail piece; use the thermometer rather than relying only on color or the timer. The temperature check is most useful when the probe enters the thickest part from the side and does not touch the pan.

If crème fraîche is unavailable, full-fat sour cream makes a practical substitute. It is a little tangier and less silky, so start with the listed lemon juice and add more only after tasting. Plain Greek yogurt also works, but it makes the sauce sharper and thicker; loosen it with a teaspoon of water if needed. For a milder sauce, use all Dijon instead of whole-grain mustard, though you will lose the mustard seeds and their gentle texture.

Drying the fish before seasoning helps the surface roast instead of steaming. Leave space between fillets and potatoes; a crowded pan traps moisture. If the potatoes are not browned after the salmon is done, move the fish to a warm plate and roast the potatoes for another 3 to 5 minutes rather than overcooking the fish.

Fresh dill gives the sauce its clean, grassy flavor. If you only have dried dill, use 2 teaspoons (about 1 g) in the sauce and let it sit for 10 minutes before tasting, since dried herbs take time to hydrate. It will be less vivid than fresh dill, so finish with lemon zest or a little extra lemon juice if the flavor seems muted.

Serving Suggestions

The potatoes, salmon, sauce, and cucumber salad make a complete meal, but a slice of dense rye bread is useful for catching the extra sauce. For a more substantial table, add steamed green beans, roasted asparagus, or a simple leafy salad dressed with oil and vinegar. Keep those sides lightly seasoned so they do not compete with the mustard and dill.

Serve the cucumber salad cool and the salmon straight from the oven. If you are setting out the meal family-style, place the salmon and potatoes on a warm platter, but keep the crème fraîche sauce in a separate bowl. The contrast between warm fish, crisp-edged potatoes, cool cucumber, and chilled sauce is part of the appeal. Lemon wedges let diners brighten their own portions.

Variations

For a more pronounced Swedish flavor, stir 1 teaspoon (5 g) prepared horseradish into the dill sauce. It adds a gentle heat and works especially well with rich salmon. For a softer, less tangy sauce, reduce the lemon juice to 2 teaspoons (10 ml) and add another teaspoon of honey. Taste before adding extra salt because both mustard and crème fraîche can vary in saltiness.

Use steelhead trout in place of salmon if that is what is available; choose fillets of similar thickness and cook them to the same safe fish temperature. The flavor is usually a little milder, so the dill and mustard may seem more prominent. Arctic char is another suitable option, though its fillets can be thinner and may finish sooner. Check temperature early rather than assuming the full cooking time applies.

To make the meal without potatoes, serve the salmon over boiled new potatoes or buttered barley cooked separately. For a dairy-free sauce, use an unsweetened, plain plant-based sour cream alternative and taste carefully before adding lemon; the texture and tang vary by product. You can also skip the sauce and dress the fish with olive oil, lemon, and dill, but the plate will be lighter and less creamy.

For a sharper cucumber salad, replace the sugar with 1 teaspoon (7 g) honey and add a few extra drops of vinegar. For a milder version, leave out the red onion or soak its slices in cold water for 5 minutes, then drain and pat dry. These small changes let you adjust the salad without changing the salmon cooking method.

Storage and Reheating

Refrigerate leftover salmon, potatoes, cucumber salad, and sauce within 2 hours of cooking, storing them in separate airtight containers. The cooked salmon and potatoes keep for 3 to 4 days in the refrigerator at 40°F (4°C) or below. The cucumber salad is best within 1 to 2 days because it releases liquid and loses its crunch. Keep the cold sauce covered and use it within 3 to 4 days, provided it has stayed refrigerated.

For the best texture, reheat salmon gently in a covered oven-safe dish at 275°F (135°C) until hot, checking with a food thermometer that leftovers reach 165°F (74°C). A microwave also works: use short bursts at medium power and cover the fish to limit drying. Reheat potatoes in a skillet or in a 400°F (204°C) oven until hot and crisp again. Do not reheat the cucumber salad or dill sauce; serve them cold. Freezing cooked salmon is possible for up to 2 months for best quality, though it may be drier after thawing. Thaw it in the refrigerator, not on the counter.

Frequently Asked Questions

Can I use frozen salmon?
Yes. Thaw it overnight in the refrigerator, then unwrap and pat it very dry before seasoning. If the fillets are still partly frozen, they will cook unevenly and may release extra water on the pan. Check the thickest section with a thermometer and continue cooking as needed until it reaches 145°F (63°C).

Can I prepare any part of the recipe ahead?
You can mix the dill sauce up to a day ahead and keep it covered in the refrigerator. The potatoes can be washed and cut several hours ahead; keep them submerged in cold water in the refrigerator, then drain and dry them very thoroughly before roasting. Slice the cucumber closer to serving time, because it becomes watery as it sits in the vinegar dressing.

How do I tell when salmon is done without drying it out?
A food thermometer is the most reliable check: measure the thickest part and cook to the USDA FSIS safe minimum of 145°F (63°C). Thickness, starting temperature, and oven differences affect timing, so the stated 12 to 14 minutes is a guide rather than a guarantee. Once it reaches temperature, remove it promptly and let it rest briefly.

Can I make this recipe with one large salmon fillet?
Yes, use a piece weighing about 1½ pounds (680 g) and roast it in the open center of the pan. A single thick piece may take longer than individual portions, so begin checking its thickest point at about 12 minutes and continue in short intervals. The same 145°F (63°C) internal temperature applies. Cut it into four portions after resting.

What can I use instead of fresh dill?
Dried dill is the easiest substitute: use about 2 teaspoons (1 g) in the sauce and allow it to stand for 10 minutes so it can soften. Chopped chives or parsley can add a fresh herbal note, but they do not taste like dill. If using either, keep the mustard and lemon amounts the same and adjust the seasoning after tasting.

Is this a traditional Swedish recipe?
No. This is a Swedish-inspired salmon supper rather than a single established traditional dish from Sweden or South Puget Sound. Mustard, dill, salmon, potatoes, and cucumber are flavors and ingredients that suit the style, while the local framing points to the Pacific Northwest fish. Regional and household versions of Scandinavian-style salmon meals vary.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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