
Whole roasted fish is one of those showstopper meals that looks far more impressive than the effort it actually takes. Two whole fish — branzino, sea bass, or red snapper all work beautifully — get scored, seasoned, and stuffed with lemon rounds, fresh thyme, rosemary, garlic, and parsley before hitting a hot oven alongside a bed of sliced zucchini and fennel. The high roasting temperature crisps the skin while keeping the flesh tender and flaky, and the aromatics perfume every bite from the inside out. Since every single ingredient here is naturally free of stimulants, you can enjoy a deeply satisfying, restaurant-worthy dinner without a second thought about what's in it. The roasted fennel and zucchini soak up the herby, lemony drippings and become their own little side dish, so the whole meal comes together on one pan. A final squeeze of fresh lemon at the table brightens everything up and makes the flavors pop. This is the kind of weeknight-or-weekend recipe that earns serious compliments with surprisingly minimal fuss.
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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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