
Leeks are one of those vegetables that transform completely under high heat — what starts out mild and a little grassy turns sweet, silky, and deeply caramelized at the edges. This simple roasted preparation lets that natural flavor shine with nothing more than good olive oil, a little seasoning, and a bright squeeze of fresh lemon at the end. For anyone managing fructose intake, leeks can be tricky since the dark-green tops tend to concentrate more of the problematic sugars — but this recipe specifically calls for the white and light-green parts only, which keeps things much more manageable. The technique is straightforward: roast cut-side down to build that golden crust, then flip to finish and let the layers go completely tender. A drizzle of the remaining olive oil and a handful of fresh parsley at the end make it feel genuinely restaurant-worthy. It works beautifully as a side dish alongside grilled proteins or simple grains, and the whole thing comes together on a single sheet pan with minimal cleanup.
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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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