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Roasted Cucumber Sandwiches

These roasted cucumber sandwiches offer a modern and sophisticated take on a classic British lunchtime staple. Roasting the cucumbers intensifies their subtle sweetness and provides a delightful crisp-tender texture that pairs perfectly with a creamy, herb-flecked dressing. By using labneh and salty capers, this vegetarian dish balances refreshing flavours with a savoury depth that makes it far more substantial than a traditional tea sandwich.

Ideal for a garden lunch or a weekend picnic, this recipe works beautifully with artisan focaccia or toasted ciabatta rolls. The combination of fresh flat-leaf parsley and mint provides a bright finish, while the olive oil-brushed bread adds a satisfying crunch. It is a nutritious and light option for those seeking a homemade vegetarian meal that feels both familiar and entirely new.

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Ingredients for Roasted Cucumber Sandwiches

  • 1.1kg Japanese, Persian, or English hothouse cucumbers

  • 2 tablespoons (1/4 stick) unsalted butter, melted

  • 170g labneh (Lebanese yoghurt cheese) or Greek-style yoghurt

  • 110g mayonnaise

  • 3 tablespoons salt-packed capers, rinsed well, roughly chopped

  • 1 garlic clove, finely chopped

  • 2 tablespoons finely chopped fresh flat-leaf parsley

  • 2 tablespoons finely chopped fresh mint leaves

  • 1 tablespoon (or more) fresh lemon juice

  • Fine sea salt and freshly ground black pepper

  • 2 9x7 inch loaves focaccia, halved horizontally, or 8 ciabatta rolls

  • Extra-virgin olive oil

Preheat oven to 400°. If using English cucumbers, split lengthwise and remove seeds (leave other varieties whole). Arrange cucumbers on a parchment paper-lined baking sheet. (If using English cucumbers, arrange cut side down.) Brush with melted butter. Roast cucumbers until crisp-tender, about 15 minutes. Transfer cucumbers to a paper towel-lined plate; chill until cold.

Cut Japanese or Persian cucumbers lengthwise in half. Cut hothouse cucumber halves lengthwise in half. Slice crosswise into 1/4 inch-thick pieces. Whisk labneh and next 5 ingredients in a large bowl. Stir in sliced cucumbers and 1 tablespoon lemon juice. Season filling to taste with salt, pepper, and more lemon juice, if desired.

Brush cut sides of focaccia or rolls with olive oil; place on a baking sheet and toast in a 400° oven until just crispy and lightly browned, 3-5 minutes. Divide filling among focaccia bottoms, cover with tops, and cut each into 4 sandwiches (or divide filling among rolls).

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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