
Mackerel is one of those deeply flavorful, omega-rich fish that deserves far more time in the spotlight, and baking it with fragrant herbs and good olive oil is genuinely one of the best ways to let it shine. The spice rub — turmeric, smoked paprika, black pepper, and sea salt — gives each fillet a gorgeous golden crust and a warmth that pairs beautifully with the bright, grassy finish from fresh parsley, dill, and thyme scattered on right out of the oven. Thin lemon rounds and sliced garlic roast alongside the fish, mellowing into something almost jammy and deeply savory by the time everything comes out of the oven. For anyone navigating a citric acid sensitivity, fish dishes can feel tricky because so many packaged marinades and seasoning blends sneak in citric acid as a preservative. This recipe sidesteps all of that by relying entirely on whole, recognizable ingredients — nothing processed, nothing hidden. The lemon here is a whole fresh fruit, not a concentrate or additive, so you stay in full control of what goes on the plate. It comes together on a single baking sheet, which means minimal cleanup and maximum payoff for a weeknight dinner or an easy weekend meal worth showing off.
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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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