
Mackerel is one of those fish that rewards bold seasoning, and a blend of turmeric, smoked paprika, and cracked black pepper gives these fillets a warm, golden crust that smells incredible the moment it hits the oven. Every ingredient here is naturally free of wheat — no breadcrumbs, no flour dredge, no hidden grain-based coatings — so the dish works beautifully without any substitutions or workarounds. The garlic slices and lemon rounds roast right alongside the fish, softening and caramelizing into something almost jammy that pairs perfectly with the rich, oily flesh. A generous finish of fresh parsley, dill, and thyme added straight out of the oven keeps the whole thing bright and herbaceous. Extra-virgin olive oil does the heavy lifting as both a cooking fat and a flavor carrier, tying all those spices together into a cohesive, restaurant-worthy result. Serve it with a squeeze of lemon and you have a complete, satisfying plate that feels far more impressive than the effort involved.
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Preheat the oven to 425°F (220°C). Line a rimmed baking sheet with parchment paper and drizzle 1 tbsp of the olive oil evenly over the surface.
In a small bowl, stir together the turmeric, smoked paprika, black pepper, and salt. Pat the mackerel fillets dry with paper towels, then rub both sides of each fillet with the spice mixture.
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