
Whole roasted fish is one of those showstopper meals that looks far more impressive than the effort it actually takes, and this Mediterranean version delivers on every level. Branzino, sea bass, or red snapper get stuffed with fragrant layers of lemon, rosemary, thyme, garlic, and parsley before hitting a hot oven alongside sliced zucchini and fennel — the result is deeply aromatic, beautifully flaky, and bright with citrus. For anyone navigating paraben-free eating, the appeal here is the ingredient list itself: every single component is a whole, unprocessed food with nothing hidden inside. No packaged sauces, no pre-made spice blends with mystery additives, no store-bought marinades — just olive oil, fresh herbs, vegetables, and fish. Scoring the flesh before roasting is a small step that makes a real difference, letting the seasoning work all the way through and ensuring even cooking without drying anything out. The roasted fennel and zucchini underneath soak up the fish's juices as everything cooks together, turning into a savory, tender side that needs absolutely nothing extra. Finish with a squeeze of fresh lemon and a handful of parsley, and dinner is genuinely done.
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Preheat the oven to 425°F (220°C). Toss the zucchini and fennel with 1 tbsp of the olive oil, the dried oregano, and a pinch of salt and pepper on a large rimmed baking sheet, then spread them into an even layer.
Pat the fish completely dry inside and out with paper towels. Using a sharp knife, cut 3 diagonal slashes about 1/2 inch deep through the thickest part of each fish on both sides — this helps the fish cook evenly and allows the seasoning to penetrate.
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