If you’re craving a dish that perfectly balances sweet, savory, and flaky textures all in one bite, this Sweet Potato, Feta & Caramelised Onion Tart Recipe is your new best friend in the kitchen. Imagine tender roasted sweet potatoes layered over a golden puff pastry, topped with creamy feta and rich, deeply caramelised onions—a combination that feels both comforting and elegant. It’s a stunning meal that’s simple enough for a weeknight yet special enough to impress guests, making it one of my absolute favorite savory tarts to whip up any time of year.
Ingredients You’ll Need
You only need a handful of straightforward ingredients to create this sweet potato, feta & caramelised onion tart, but each one plays a crucial role in delivering amazing flavor and texture. From the buttery puff pastry acting as a crispy canvas, to the fresh thyme adding just the right herbal lift, every element counts in this harmonious dish.
- Puff pastry sheet: Provides a buttery, flaky base that beautifully supports the toppings.
- Sweet potatoes: Thinly sliced for even roasting, they bring natural sweetness and a lovely soft texture.
- Olive oil: Coats the sweet potatoes, helping them roast to tender perfection with a subtle fruity undertone.
- Salt and black pepper: Simple seasonings that elevate all the flavors without overpowering them.
- Large onion: Thinly sliced for caramelising, adding a rich, jammy sweetness that pairs perfectly with the other ingredients.
- Butter: Used to caramelise the onions for a silky, melt-in-your-mouth effect.
- Brown sugar: Helps deepen the onions’ caramelisation with a hint of molasses-like sweetness.
- Feta cheese: Crumbled on top for a tangy, salty contrast that cuts through the sweetness.
- Fresh thyme leaves: Adds a fragrant, earthy note that brightens the tart.
- Egg: Beaten for egg wash, gives the pastry a beautiful golden shine and crispness.
How to Make Sweet Potato, Feta & Caramelised Onion Tart Recipe
Step 1: Preheat and Prepare
Start by preheating your oven to 400°F (200°C) and lining a baking sheet with parchment paper. This step ensures you have everything ready so you can move smoothly through the cooking process, preventing any drying out or overcooking later on.
Step 2: Roast the Sweet Potatoes
Toss those thinly sliced sweet potatoes in olive oil, salt, and freshly cracked black pepper. Spreading them evenly on your prepared baking sheet, roast for 20 minutes until soft and tender. This roasting step not only softens the potatoes but also concentrates their natural sweetness, making every bite delightful.
Step 3: Caramelise the Onions
While the sweet potatoes are roasting, melt butter in a skillet over medium heat and add the thinly sliced onions. As the onions soften, sprinkle in brown sugar and let them cook slowly until they turn golden and richly caramelised—about 15 minutes. This slow caramelisation is what gives the tart its deep, luscious flavor foundation.
Step 4: Prepare the Puff Pastry
Lightly flour your surface and roll out the puff pastry sheet just a tad to fit your baking tray. Transfer it carefully onto your lined sheet, then score a 1-inch border around the edges without cutting all the way through. This border will puff up beautifully in the oven, creating a perfect edge that holds all the delicious fillings in place.
Step 5: Assemble the Tart
Spread a generous layer of caramelised onions inside the pastry border, creating a sweet and savory base. Arrange the roasted sweet potato slices on top, layering them carefully for a pretty presentation. Finally, sprinkle crumbled feta cheese evenly and scatter fresh thyme leaves over everything, adding that vibrant herby punch that wakes up all the flavors.
Step 6: Egg Wash and Bake
Brush the scored pastry border with the beaten egg to give it a gorgeous golden color once baked. Pop your tart in the oven for 20 to 25 minutes until the pastry puffs up and turns an irresistible golden brown. The smell filling your kitchen at this stage is pure magic.
Step 7: Cool and Serve
Allow the tart to cool slightly before slicing. It’s wonderful served warm or even at room temperature, making it a versatile choice for any gathering or cozy meal.
How to Serve Sweet Potato, Feta & Caramelised Onion Tart Recipe
Garnishes
To finish your tart like a pro, sprinkle a few fresh thyme sprigs or some finely chopped parsley on top for an easy pop of green. A light drizzle of good-quality olive oil or a balsamic glaze can also add extra layers of flavor that make each bite even more memorable.
Side Dishes
This tart pairs wonderfully with a crisp green salad dressed simply with lemon vinaigrette to cut through the richness. Roasted vegetables or a bright beet and orange salad bring complementary textures and colors to the table. For a heartier meal, serve alongside a warm bowl of soup like roasted tomato or butternut squash.
Creative Ways to Present
For a festive spread, cut the tart into small squares or bite-sized pieces and serve on a platter as an elegant appetizer. Alternatively, top with a dollop of Greek yogurt or crème fraîche and a sprinkle of toasted walnuts for an extra indulgent twist. This flexibility makes the Sweet Potato, Feta & Caramelised Onion Tart Recipe perfect for both casual and special occasions.
Make Ahead and Storage
Storing Leftovers
Once cooled, store leftovers in an airtight container in the refrigerator. The tart keeps beautifully for up to 3 days, and flavors often develop even more as they mingle during storage.
Freezing
You can freeze individual portions of the tart wrapped tightly in plastic and foil. When properly sealed, it can last in the freezer for up to 1 month without compromising taste or texture.
Reheating
To reheat, place the tart slices on a baking sheet and warm them in the oven at 350°F (175°C) for about 10 minutes or until heated through and the pastry regains its crispness. Avoid microwaving if possible to keep that delightful flaky texture.
FAQs
Can I use a different type of cheese instead of feta?
Absolutely! While feta’s tangy saltiness complements the sweet potato and onions perfectly, goat cheese or ricotta can also work beautifully for a creamier profile.
Is puff pastry necessary for this tart?
Puff pastry is ideal because it creates a light, flaky texture and holds the tart fillings well. However, you could experiment with shortcrust pastry for a sturdier, more crumbly base.
How do I know when the onions are properly caramelised?
Onions are properly caramelised when they turn a deep golden brown color, become soft, sweet, and slightly sticky, usually after about 15 minutes of low to medium heat cooking.
Can I prepare parts of this tart ahead of time?
Yes, you can roast the sweet potatoes and caramelise the onions a day in advance. Assemble and bake the tart when you’re ready, which makes this dish great for entertaining with less last-minute effort.
What can I do if my sweet potato slices are too thick?
Thicker slices may not roast evenly or become tender in the allotted time. Slice them as thinly as possible for the best results, or roast longer while checking frequently to avoid drying out.
Final Thoughts
This Sweet Potato, Feta & Caramelised Onion Tart Recipe is such a wonderful way to bring rustic, vibrant flavors into your kitchen with minimum fuss and maximum reward. Whether you’re enjoying it as a cozy dinner or sharing it with friends at a gathering, this tart never fails to delight and impress. I hope you find as much joy making and eating it as I do—happy cooking!
Print
Sweet Potato, Feta & Caramelised Onion Tart Recipe
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Total Time: 60 minutes
- Yield: 6 servings
- Category: Tart
- Method: Baking
- Cuisine: Mediterranean
- Diet: Vegetarian
Description
A delicious Sweet Potato, Feta & Caramelised Onion Tart featuring a flaky puff pastry base topped with tender roasted sweet potatoes, sweet caramelised onions, tangy crumbled feta, and fragrant fresh thyme. Perfect as a savory brunch dish, appetizer, or light dinner.
Ingredients
Pastry & Vegetables
- 1 sheet puff pastry, thawed
- 2 medium sweet potatoes, peeled and sliced thin
- 1 tbsp olive oil
- Salt and black pepper, to taste
Caramelised Onions
- 1 large onion, thinly sliced
- 1 tbsp butter
- 1 tsp brown sugar
Topping
- 4 oz feta cheese, crumbled
- 1 tsp fresh thyme leaves
Egg Wash
- 1 egg, beaten (for egg wash)
Instructions
- Preheat Oven: Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper to prevent sticking.
- Roast Sweet Potatoes: Toss the thinly sliced sweet potatoes with olive oil, salt, and pepper. Spread them on the prepared baking sheet and roast for 20 minutes until tender. Remove from oven and set aside to cool slightly.
- Caramelise Onions: In a skillet over medium heat, melt butter. Add the thinly sliced onions and sauté until softened. Sprinkle brown sugar over the onions and continue cooking, stirring occasionally, until onions turn golden and caramelised, about 15 minutes. Remove from heat and set aside.
- Prepare Pastry Base: Lightly flour a surface and roll out the puff pastry sheet slightly to even out. Transfer it to the lined baking sheet. Score a 1-inch border around the edges, being careful not to cut through the pastry, to allow the edges to puff up during baking.
- Assemble Tart: Spread the caramelised onions evenly within the scored border on the pastry. Arrange the roasted sweet potato slices on top of the onions. Sprinkle the crumbled feta cheese evenly over the top, then scatter the fresh thyme leaves for added aroma and flavor.
- Egg Wash and Bake: Brush the exposed pastry border with the beaten egg to get a golden, shiny finish. Bake the tart in the preheated oven for 20–25 minutes, or until the pastry is puffed and golden brown.
- Cool and Serve: Once baked, remove the tart from the oven and let it cool slightly. Slice into portions and serve warm or at room temperature for the best flavor.
Notes
- Make sure to slice sweet potatoes thinly for even roasting.
- Caramelise onions slowly over medium heat to develop sweetness without burning.
- Puff pastry should be kept cold before baking for maximum flakiness.
- The tart can be served warm or at room temperature, making it ideal for entertaining.
- For a gluten-free version, substitute puff pastry with a gluten-free pastry alternative.
- Leftover tart can be refrigerated for up to 2 days and reheated gently.
