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Potato Tart with Mustard Greens and Lemon Thyme

This elegant potato tart with mustard greens and lemon thyme is a wonderful choice for a sophisticated vegetarian lunch or a light midweek supper. The combination of earthy mustard greens and citrusy thyme provides a vibrant flavour profile that perfectly complements the creamy, thin layers of potato. Using wholemeal filo pastry instead of traditional shortcrust adds a delightful crunch while keeping the dish lighter and lower in saturated fat.

Packed with nutrients from the leafy greens and high-quality protein from the eggs and goat’s cheese, this tart is as nourishing as it is delicious. It is particularly striking when served warm with a crisp green salad or a side of steam-roasted vine tomatoes. Whether you are hosting a brunch or meal-prepping for the week ahead, this versatile tart is a reliable favourite.

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Ingredients for Potato Tart with Mustard Greens and Lemon Thyme

  • 4 sheets whole wheat phyllo dough

  • 1 large Yukon Gold potato, sliced paper thin

  • 120ml buttermilk

  • Salt and freshly ground black pepper

  • 1 tablespoon canola oil

  • 1/2 cup chopped onion

  • 2 cups chopped mustard greens

  • 2 large eggs

  • 3 large egg whites

  • 1/2 cup skimmed milk

  • 2 teaspoons lemon thyme leaves

  • 60g soft goat cheese (about 60ml )

Preheat the oven to 191°C. Line a 10-inch tart pan with the whole wheat phyllo dough. Leave a 1/2-inch overhang and trim any excess. Place the tart pan on a baking sheet. In a medium mixing bowl, toss the potato slices with the buttermilk and season with salt and pepper. In a large sauté pan, heat the canola oil over medium heat and add the onions. Cook the onions for 2 minutes over medium-high heat. Add the mustard greens to the pan and cook for 5 minutes or until they are wilted. Season with salt and pepper. Shingle half the potato slices on the bottom of the phyllo-lined tart pan. Sprinkle with half of the mustard greens. Repeat the process with the remaining potatoes and mustard greens. In a medium bowl, whisk the eggs, egg whites, and skimmed milk for 1 minute or until combined. Add the lemon thyme and season with salt and pepper. Pour the egg mixture over the potatoes. Drop teaspoons of the goat cheese around the tart. Bake the tart for 45 to 60 minutes or until it is just set and the potatoes are cooked. Remove from the oven and let sit for 15 minutes before cutting. Cut the tart into 6 pieces and place on a serving plate.

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 editors

    Peer reviewed by

    UK recipe editors
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