
Leeks are one of those vegetables that completely transform in the oven — what starts out mild and a little grassy becomes sweet, silky, and deeply caramelized at the edges. This simple side dish lets that natural flavor shine with nothing more than good olive oil, a little heat, and a bright squeeze of fresh lemon at the end. The double-roast method, cut-side down first and then flipped, is the secret to getting that gorgeous golden color without drying the layers out. A pinch of red pepper flakes adds just enough warmth to keep things interesting, and the optional parsley brings a pop of freshness that makes the whole platter look like it came from a restaurant kitchen. Since every ingredient here is straightforward and plant-based, there's zero guesswork about hidden seafood-derived additives or sauces — just clean, honest produce and pantry staples. It pairs beautifully alongside roasted chicken, grilled fish, or even a simple grain bowl when you want something a little more elegant than a standard vegetable side.
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Preheat the oven to 425°F (220°C). Line a large baking sheet with parchment paper.
Trim the root ends and dark-green tops from the leeks, leaving only the white and light-green parts. Halve each leek lengthwise, then rinse under cold running water, fanning the layers to remove any grit. Pat thoroughly dry with paper towels.
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