Roasted Mackerel with Mushroom and Thyme
Prep
15 mins
Cook
25 mins
Servings
4
Difficulty
Easy
Pan-seared mackerel fillets topped with a rich medley of roasted mushrooms, garlic, and fresh thyme, finished with a squeeze of lemon and drizzle of olive oil.
Ella x
Ingredients
- 4mackerel fillets(skin-on, about 150g each)
- 400 gmixed mushrooms(cremini, oyster, and shiitake, halved)
- 4garlic cloves(thinly sliced)
- 8 sprigsfresh thyme
- 4 tablespoonsolive oil(divided)
- 1 teaspoonsea salt
- ½ teaspoonblack pepper
- 1lemon(halved)
- 1shallot(thinly sliced)
- 100 mlwhite wine
- 20 gbutter
Detail level
Instructions
- 1
Preheat your oven to 200°C (400°F). Pat the mackerel fillets dry with paper towels and season both sides generously with sea salt and black pepper.
Tip: Drying the fish ensures the skin crisps beautifully when seared.
- 2
Heat 2 tablespoons of olive oil in a large oven-safe skillet over medium-high heat. Once hot, carefully place the mackerel skin-side down and sear for 3-4 minutes until the skin is golden and crispy. Transfer to a plate.
Tip: Don't move the fillets while cooking to achieve optimal crispness.
- 3
In the same skillet, add the remaining 2 tablespoons of olive oil. Sauté the shallot and sliced garlic for 1 minute until fragrant, stirring constantly to prevent burning.
Tip: Keep the heat at medium to avoid scorching the garlic.
- 4
Add the halved mushrooms to the skillet and cook for 4-5 minutes, stirring occasionally, until they start to release their moisture and begin to brown.
Tip: Allow mushrooms to develop color for deeper, earthier flavor.
- 5
Deglaze the skillet with white wine, scraping up any browned bits from the bottom. Let it simmer for 2 minutes until reduced by half.
Tip: The wine adds acidity and complexity to balance the richness of the mackerel.
- 6
Nestle the seared mackerel fillets skin-side up into the mushroom mixture. Scatter the thyme sprigs over the top and dot with butter. Transfer the skillet to the preheated oven.
Tip: Placing the fillets skin-side up keeps them moist during roasting.
- 7
Roast for 10-12 minutes until the mackerel is cooked through and flakes easily with a fork. The mushrooms should be fully tender and caramelized.
Tip: Mackerel is lean and cooks quickly; avoid overcooking to maintain moisture.
- 8
Remove from the oven and finish with a generous squeeze of fresh lemon juice over each fillet. Taste and adjust seasoning if needed before serving directly from the skillet.
Tip: Fresh lemon brightens the rich flavors and adds a final layer of freshness.
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