Sill med Äppl: Warm Nordic Herring with Apple Compote & Boiled Potatoes
A warm, comforting reinterpretation of the classic Danish 'Sild med Æble' where wild-caught herring is gently pan-seared and served with a tart-sweet apple compote and creamy new potatoes. This dish replaces refined sugar and seed oils with whole dates and extra-virgin olive oil, delivering a savory, umami-rich lunch that honors the Nordic tradition of fermentation and seasonal produce.
A little context
Rooted in the Scandinavian tradition of preserving fish through salting and pickling to survive harsh winters, this recipe honors the 'hygge' of a warm, simple meal. We have stripped away the traditional white sugar often used in the apple sauce and the refined vinegar shortcuts, replacing them with whole dates and organic apple cider vinegar to respect the integrity of the ingredients while maintaining the essential sweet-sour balance.
The longevity story
This meal is a powerhouse of long-chain omega-3 fatty acids (EPA and DHA) from the wild-caught herring, which are critical for reducing systemic inflammation and supporting brain longevity. The apple compote, sweetened only by the natural fructose of whole dates, provides pectin and quercetin, a flavonoid with potent antioxidant properties. Fermented herring introduces beneficial probiotics and B-vitamins, while the extra-virgin olive oil adds a high dose of oleocanthal, a polyphenol with aspirin-like anti-inflammatory effects.
Method
- 01
Prepare the Potatoes
Place the scrubbed potatoes in a large pot, cover with cold water, and add a generous pinch of sea salt. Bring to a boil, reduce to a simmer, and cook for 15–20 minutes until a knife slides in easily. Do not overcook; they should hold their shape.
- 02
Make the Apple Compote
While potatoes cook, combine the diced apples, chopped dates, apple cider vinegar, and star anise in a small saucepan. Add 60 ml (1/4 cup) of water. Simmer over medium-low heat for 15–20 minutes, stirring occasionally, until the apples are tender and the dates have dissolved into a thick, glossy sauce. Remove from heat and discard the star anise.
- 03
Poach the Herring
In the heavy-bottomed pot, combine 240 ml (1 cup) of water, 1 tbsp of the apple cider vinegar, and a pinch of sea salt. Bring to a very gentle simmer (do not boil vigorously). Carefully lower the herring fillets, skin-side up, into the liquid. Poach for 3–4 minutes until the flesh is just opaque and flakes easily with a fork. Remove immediately with a slotted spatula and keep warm.
- 04
Finish the Potatoes
Drain the potatoes and return them to the warm pot. Drizzle with the remaining 2 tbsp of extra-virgin olive oil and toss gently to coat. The residual heat will warm the oil and release its polyphenols.
- 05
Assemble and Serve
Plate the warm potatoes, top with a generous spoonful of the warm apple compote, and place a herring fillet on top. Finish with a drizzle of raw extra-virgin olive oil and a generous scattering of fresh dill. Serve immediately while everything is warm.
Pro tips
- ✦Sourcing is critical: Look for herring labeled 'wild-caught' from the North Atlantic or Baltic Sea; avoid farmed herring as their feed often contains corn and soy, altering the fatty acid profile.
- ✦Do not boil the herring; boiling makes the protein tough and rubbery. A gentle poach preserves the delicate texture and omega-3 integrity.
- ✦Taste the apple compote before serving; if the dates aren't sweet enough, add one more pitted date and simmer for 2 more minutes rather than adding sugar.
- ✦Choose apples that are firm and tart; sweet apples will make the compote cloying and mask the savory fish.
- ✦Ensure your extra-virgin olive oil has a fruity, peppery aroma; this indicates high polyphenol content, which is the goal of this recipe.
Substitutions
- wild-caught herring → wild-caught mackerel or sardines (similar fatty acid profile and firm texture; adjust poaching time by 1 minute if fillets are smaller)
- Medjool dates → pure maple syrup (1 tbsp) or monk fruit syrup (dates provide fiber and a deeper flavor, but maple works in a pinch for sweetness only)
Storage
Store components separately in glass containers. The herring and compote can be refrigerated for up to 3 days. Reheat gently; do not microwave the fish to avoid texture degradation. Potatoes are best fresh but can be reheated in a pan with a splash of water.
What to serve with it
- Hot green tea (sencha or matcha) to complement the fish without adding sugar
- Sparkling water with a wedge of lemon and a sprig of dill
- A small glass of dry, organic Riesling or a light Pinot Noir
FAQ
Can I use canned herring?+
Canned herring is often packed in vegetable oils or heavy brine with added sugar. If you must use canned, rinse thoroughly, drain, and check the label for 'no added sugar' and 'olive oil' only, then warm gently in a pan with fresh EVOO.
Why warm the fish instead of serving it cold?+
While traditional 'sill' is often cold, serving it warm (Sill med Äppl) creates a more comforting, gut-friendly meal that is easier to digest for some, and it allows the apple compote to meld with the fish oils more effectively.
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