
Whole roasted fish is one of those showstopper meals that looks far more impressive than the effort it actually takes. Two beautiful fish — branzino, sea bass, or red snapper all work wonderfully — get stuffed with lemon rounds, fresh thyme, rosemary, garlic, and parsley before hitting a hot oven alongside a bed of sliced zucchini and fennel. Those diagonal slashes cut into each fish aren't just for looks; they help the heat and seasoning work all the way through to the bone, giving you perfectly cooked, flaky flesh every single time. The whole thing roasts together on one baking sheet, so cleanup is minimal and the vegetables soak up all those herby, citrusy juices as they caramelize underneath. This is the kind of recipe that feels like a Mediterranean coastal dinner without requiring any complicated technique or hard-to-find ingredients. A squeeze of fresh lemon at the table and a scatter of parsley finish it off with brightness, and honestly, it's hard to believe something this elegant comes together so simply.
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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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