
Leeks are one of those vegetables that transform completely in the oven — what starts out sharp and a little grassy becomes sweet, silky, and deeply caramelized at the edges. This simple roasted preparation lets that natural sweetness shine without any cream, butter, or cheese getting in the way. A generous squeeze of fresh lemon at the end cuts through the richness of the olive oil and brightens the whole dish beautifully. The optional red pepper flakes add just enough heat to keep things interesting, and a handful of fresh parsley makes it feel finished and vibrant on the plate. Everything here is naturally free of dairy in any form, so there's no swapping or substituting required — just clean, honest ingredients doing exactly what they're supposed to do. It works as an elegant side alongside roasted chicken or fish, but honestly it's satisfying enough to eat on its own with some crusty bread.
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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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