Crab Toast with Lemon Aioli
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 28 Jan 2026
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This elegant crab toast with lemon aioli is a sophisticated, high-protein starter or light lunch that celebrates fresh, coastal flavours. The combination of succulent lump crabmeat and aromatic fennel fronds creates a delicate balance, while the homemade garlic and lemon aioli adds a rich, zesty finish. Using sourdough bread provides a sturdy, tangy base that, when toasted in olive oil, offers a satisfying crunch to contrast the tender seafood topping.
Perfect for weekend brunching or as an impressive dinner party appetiser, this dish is surprisingly simple to assemble once the aioli is whisked to perfection. Higher in protein and full of healthy fats from the extra-virgin olive oil, it is a nutritious yet indulgent choice. Serve these toasts warm with extra lemon wedges for squeezing to brighten the savoury notes of the crab.
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Ingredients for Crab Toast with Lemon Aioli
1 large egg yolk
1 garlic clove, finely grated
1 teaspoon finely grated lemon zest
2 tablespoons (or more) fresh lemon juice
1 teaspoon Dijon mustard
Kosher salt
240ml vegetable oil
230g lump crabmeat, picked over
2 tablespoons chopped fennel fronds
1 to 2 serrano chillies, seeded, finely chopped
6 tablespoons extra-virgin olive oil, divided
Kosher salt
4 3/4"-thick slices country-style sourdough bread
lemon wedges, for serving
How to make Crab Toast with Lemon Aioli
Back to contentsWhisk egg yolk, garlic, lemon zest and juice, mustard, and a large pinch of salt in a medium bowl. Whisking constantly, slowly drizzle in oil, drop by drop at first, until aioli is thickened and smooth; season with salt and more lemon juice, if desired.
Toss crabmeat, fennel fronds, 1 chilli, and 2 tablespoons oil in a medium bowl. Season with salt; add more chilli, if desired.
Drizzle both sides of bread with remaining 60ml oil; working in batches, toast in a large skillet over medium-high heat until golden brown, about 2 minutes per side.
Spread each piece of toast with 1 tablespoon aioli. Top with crabmeat; cut each toast into 4 pieces. Place a small dab of aioli in centre of each piece; serve with lemon wedges. (Extra aioli can be used for dressings or dips.)
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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