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Olive Oil-Roasted Leeks

Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 16 Jan 2026

Meets Patient’s editorial guidelines

These olive oil-roasted leeks are a masterclass in how slow cooking can transform a humble vegetable into a luxurious side dish. By gently confitting the leeks in plenty of oil before a final blast of heat, they develop a buttery, melt-in-the-mouth texture and a deep, concentrated sweetness. The outer layers become slightly crisp and golden, while the centres remain wonderfully tender and succulent.

This simple vegan dish is an excellent addition to a Sunday roast or served alongside crusty bread and creamy pulses for a light, plant-based supper. As an added bonus, the leftover infused oil is packed with savoury flavour and makes a fantastic base for homemade salad dressings or for sautéing aromatics in your next soup or stew.

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Ingredients for Olive Oil-Roasted Leeks

  • 6 leeks, white and pale-green parts only, cut in half lengthwise

  • 120ml olive oil

  • Salt

How to make Olive Oil-Roasted Leeks

Place a rimmed baking sheet in oven and preheat to 204°C. Cut 6 leeks, white and pale-green parts only, in half lengthwise. Rinse well and pat completely dry. Toss with 120ml olive oil; season with salt. Arrange leeks, cut side down, on hot baking sheet and cover loosely with foil. Reduce oven temperature to 149°C. Bake until leeks are lightly browned on cut sides and very tender, about 1 1/2 hours.

Uncover leeks and turn cut side up. Increase oven temperature to 204°C; roast leeks until golden brown, 15-20 minutes. (Reserve the oil for making vinaigrettes or roasting vegetables. Let cool; cover and chill.)

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 16 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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