Smoked Trout Crostini with Grilled Fennel and Red Onion
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 28 Jan 2026
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These smoked trout crostini with grilled fennel and red onion offer a sophisticated yet simple start to any meal. This high-protein appetiser combines the delicate, salty notes of flaked trout with the mellow sweetness of charred red onion and the subtle aniseed flavour of grilled fennel. It is a fantastic choice for summer entertaining or as a light, savoury snack that feels far more indulgent than its healthy ingredients suggest.
Designed as a deconstructed sharing platter, this dish encourages guests to assemble their own snacks, making it an interactive choice for dinner parties. The fennel and onion provide a satisfying crunch that pairs perfectly with the crisp, toasted baguette. For the best result, use high-quality fillets from your local fishmonger or delicatessen and serve with a squeeze of fresh lemon.
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Ingredients for Smoked Trout Crostini with Grilled Fennel and Red Onion
20 1/2-inch-thick diagonal slices crusty baguette
20 1/2-inch wedges fresh fennel bulb (from about 2 large bulbs), fronds reserved for garnish
20 1/2-inch wedges red onion (from 2 large onions)
Olive oil
3 4 1/60g packages skinless smoked trout fillets,* broken into chunks
How to make Smoked Trout Crostini with Grilled Fennel and Red Onion
Back to contentsOn separate baking sheets, arrange bread and vegetables; brush both sides with oil and sprinkle with salt and pepper.
Prepare barbecue (medium-high heat) or preheat grill. Grill or grill bread until crisp, about 2 minutes per side if grilled, and 1 to 2 minutes per side if grilled. Grill or grill vegetables until golden and just tender, about 4 minutes per side if grilled, and 3 to 4 minutes per side if grilled. DO AHEAD: Can be made 2 hours ahead. Let stand at room temperature.
Arrange bread, vegetables, and trout on large platter. Garnish with fennel fronds. Serve, allowing guests to assemble crostini.
Available at some supermarkets and at specialty foods stores and delicatessens.
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.
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UK recipe editors
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UK recipe editors
Article history
The information on this page is peer reviewed by qualified clinicians.
28 Jan 2026 | Originally published
Authored by:
UK recipe editorsPeer reviewed by
UK recipe editors

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