
Leeks are one of those vegetables that transform completely in a hot 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 from optional red pepper flakes, and a bright squeeze of fresh lemon at the end. Every single ingredient here is naturally free of grains and cereals, so there's no label-scanning or substitution stress involved. The technique is straightforward: roast cut-side down first to build that golden color, then flip to finish the layers until they're tender all the way through. A scatter of fresh flat-leaf parsley adds a pop of color and freshness that makes the whole platter look genuinely impressive. It pairs beautifully with roasted meats, grilled fish, or anything else you've got going — and it's the kind of vegetable dish that even skeptics tend to reach for seconds of.
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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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