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Cauliflower with Leek "Ash"

This sophisticated cauliflower with leek ash is an elegant vegetarian dish that celebrates the humble brassica in various textures. By techniques such as roasting leeks until they are completely charred, you create a striking, smoky garnish that provides a dramatic contrast to the creamy, ivory-pale vegetables. This recipe transforms simple, everyday ingredients into a restaurant-standard starter that focuses on pure, clean flavours and a minimalist aesthetic.

Ideal for an impressive dinner party or a light lunch, this heart-healthy dish combines a silky-smooth purée with tender poached florets and the crunch of raw shavings. The leek ash adds a complex, savoury depth that balances the natural sweetness of the milk-poached cauliflower. Serve it in shallow bowls to showcase the different elements and ensure every spoonful is seasoned to perfection.

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Ingredients for Cauliflower with Leek "Ash"

  • 1 medium leek, white and palegreen parts only, halved lengthwise

  • 1 small head of cauliflower, cut into large florets, trimmings reserved

  • 950ml whole milk

  • Kosher salt

Preheat oven to 260°C. Set vents to high and open a window for adequate ventilation. Place leek on a foil-lined baking sheet. Roast until blackened, dry, and crisp, 70-90 minutes. Let leek cool. Break into shards. DO AHEAD: Leek ash can be made 3 days ahead. Store airtight at room temperature.

Using a mandoline, thinly slice 3 large cauliflower florets lengthwise (reserve trimmings); set aside.

Bring milk and 1 cup cauliflower trimmings to a boil in a large saucepan; reduce heat and simmer until cauliflower is tender, 20-25 minutes. Let cool slightly, then transfer cauliflower mixture to a blender or use an immersion blender in the pan and purée until smooth.

Return cauliflower purée to saucepan, add remaining cauliflower florets, and season with salt. Simmer until florets are just tender, 8-10 minutes. Using a slotted spoon, transfer florets to a medium bowl (rinse off any purée on florets).

Strain purée into another medium bowl. Divide florets among shallow bowls; spoon purée over. Garnish with reserved cauliflower slices; sprinkle with leek ash.

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.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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