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Spiced Sweet Potato Sandwich with Feta

This spiced sweet potato sandwich with feta is a vibrant and nutritious choice for a satisfying lunch or a casual evening meal. Combining earthy roasted vegetables with salty cheese and a bright herb salad, it offers a sophisticated balance of flavours and textures. The sweet potato is roasted with ancho chilli and cumin to provide a gentle, warming heat that pairs beautifully with the sharp, pickled beetroot and red onion garnish.

As a balanced nutrition dish, this sandwich is packed with colourful vegetables and fresh herbs like mint and coriander, making it as nourishing as it is delicious. The creamy garlic mayonnaise and toasted sesame rolls add a touch of indulgence, ensuring it feels like a proper treat. It is an excellent option for those looking to introduce more plant-focused recipes into their weekly routine without sacrificing heartiness or flavour.

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Ingredients for Spiced Sweet Potato Sandwich with Feta

  • 1 large sweet potato (about 350g ), peeled, sliced lengthwise into 1/4"–1/2"-thick planks

  • 1 teaspoon ancho chilli powder

  • 1/2 teaspoons ground cumin

  • 45ml extra-virgin olive oil, plus more for drizzling

  • 1 medium beet, peeled, cut into thin matchsticks or grated on the large holes of a box grater

  • 1/2 small red onion, thinly sliced

  • 45ml seasoned rice vinegar

  • 120ml mayonnaise

  • 1 large garlic clove, finely grated

  • 1 tablespoon plus 1 teaspoon fresh lemon juice

  • 2 sesame kaiser rolls, split

  • 1 1/2 cups parsley, mint, and/or coriander leaves

  • 140g block feta, thinly sliced into planks, divided

  • Kosher salt, freshly ground pepper

How to make Spiced Sweet Potato Sandwich with Feta

Preheat oven to 204°C. Combine sweet potato, ancho chilli powder, cumin, and 3 tablespoons oil in a medium bowl; season generously with salt and pepper and toss until sweet potato is evenly coated. Heat a dry large skillet, preferably cast iron, over medium. Arrange sweet potato in a single layer without overlapping (you will most likely be able to fit them all at once, but work in 2 batches if needed). Cook, undisturbed, until blackened in spots, about 4 minutes. Turn slices over and transfer skillet to oven. Roast until tender, 10–15 minutes. Remove from oven.

Meanwhile, combine beet, onion, and vinegar in a medium bowl; season generously with salt and pepper and toss well. Let sit to allow beet to soften. Mix mayonnaise, garlic, and 1 tablespoon lemon juice in a small bowl; season generously with salt and pepper.

Heat grill. Toast rolls, cut side up, on a rimmed baking sheet until golden brown, 30–60 seconds. Remove rolls from oven.

Toss herbs with remaining 1 teaspoon lemon juice in a medium bowl to coat. Drizzle with oil, season with salt and pepper, and toss again to combine.

To build sandwiches, pour off any accumulated liquid from beet mixture. Spread seasoned mayonnaise over cut sides of reserved rolls, dividing evenly (yes, it’s a lot, but you don’t want to skimp here). Arrange feta slices over bottom halves of rolls. Top with sweet potato slices and pile some beet mixture on top. Mound herbs over beets; close up sandwiches with top halves of rolls and cut in half.

Sweet potato, beet mixture, and seasoned mayonnaise can all be made 2 hours ahead. Store sweet potato and beet mixture separately, tightly covered, at room temperature. Cover and chill mayonnaise.

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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