If you’re in the mood for a dish that feels both cozy and a little bit fancy, the Sweet Potato, Feta & Caramelised Onion Tart Recipe is going to be your new go-to. This vibrant tart combines the natural sweetness of tender sweet potatoes with the tangy creaminess of feta and the deep, rich flavor of slowly caramelised onions all nestled in crisp puff pastry. It’s a feast for the eyes and palate, perfect for sharing at weekend brunches or as an impressive yet effortless appetizer when friends come over. Trust me, once you try this recipe, it will become a beloved staple in your kitchen rotation.
Ingredients You’ll Need
The magic of this tart lies in its simplicity. With just a few carefully chosen ingredients, you create a harmonious mix of textures and flavors, from the flaky crust to the soft sweet potato slices and savory feta. Each element plays an essential role in making this dish a standout.
- 1 sheet puff pastry (thawed): The buttery, flaky base that gives the tart its irresistible crispness.
- 1 large sweet potato (peeled and thinly sliced): Adds natural sweetness and a gorgeous orange hue to the tart.
- 2 tablespoons olive oil (divided): Used for caramelising onions and tossing the sweet potatoes, boosting flavor and texture.
- 2 medium onions (thinly sliced): Slowly cooked to bring out their sweetness and richness.
- 1 tablespoon balsamic vinegar: Adds acidity and depth to the caramelised onions.
- 1 teaspoon sugar: Helps the onions caramelise and balance flavors.
- 1/2 cup crumbled feta cheese: Provides tangy creaminess that contrasts beautifully with the sweet potatoes.
- 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried): Infuses the tart with lovely herbaceous notes.
- Salt and black pepper to taste: Enhances all the flavors in every bite.
- 1 egg (beaten, for egg wash – optional): Brushed on the pastry edges for a golden, glossy finish.
How to Make Sweet Potato, Feta & Caramelised Onion Tart Recipe
Step 1: Caramelise the Onions
Start by warming 1 tablespoon of olive oil in a skillet over medium heat. Add your thinly sliced onions and let them cook slowly for 10 to 15 minutes, stirring frequently. This gentle cooking process allows the onions to release their sugars and soften into a golden-brown, melt-in-your-mouth texture. Towards the end, stir in balsamic vinegar and sugar, cooking for a few more minutes until the onions are richly glazed and bursting with sweet, tangy flavor. Set these aside — they are the heart of your tart’s incredible taste.
Step 2: Prepare the Sweet Potatoes
While the onions are caramelising, toss your thinly sliced sweet potato in the remaining tablespoon of olive oil, seasoning with a little salt and pepper. This simple step ensures each slice will roast beautifully and develop that tender, slightly crisp edge once baked.
Step 3: Prepare the Puff Pastry Shell
Roll out your thawed puff pastry sheet on a parchment-lined baking sheet. Using a knife, carefully score a border about one inch around the edges, but don’t cut all the way through. This scoring will help the edges puff up and create a lovely frame for the filling. Lightly prick the center with a fork to prevent too much puffing in that area. If you want extra golden edges, brush the border with the beaten egg for a stunning finish.
Step 4: Assemble the Tart
Layer the caramelised onions evenly over the pastry’s center. Then arrange the sweet potato slices in a slightly overlapping design on top of the onions — it’s not just about taste but presentation too! Sprinkle the entire tart with crumbled feta and fresh thyme leaves. These final touches create that perfect contrast between sweet, salty, and herbaceous flavors.
Step 5: Baking to Perfection
Place the tart in your preheated oven at 400°F (200°C) and bake for 25 to 30 minutes. You’ll know it’s done when the puff pastry is gorgeously golden and puffed, and the sweet potatoes are tender when pierced with a fork. Let it cool slightly before slicing so the layers can set beautifully.
How to Serve Sweet Potato, Feta & Caramelised Onion Tart Recipe
Garnishes
A drizzle of honey over the top adds a subtle floral sweetness that complements the savory and sharp components beautifully. A handful of fresh arugula or peppery rocket on the side brings a vibrant, fresh contrast that balances the richness perfectly.
Side Dishes
This tart pairs wonderfully with crisp green salads, roasted seasonal veggies, or even a light chickpea salad. For a heartier meal, offer it alongside a bowl of warm soup — something like spiced butternut squash or tomato basil works like a charm.
Creative Ways to Present
Serve your tart as a centerpiece on a rustic wooden board with a sprinkle of fresh herbs scattered around. Cut into neat squares for a party platter or offer it sliced like a pie for an elegant dinner presentation. You can also make mini tarts using smaller puff pastry sheets for an adorable appetizer option.
Make Ahead and Storage
Storing Leftovers
Once cooled, store leftover tart slices in an airtight container in the refrigerator for up to 3 days. The flavors actually deepen overnight, making for an excellent next-day snack or light meal.
Freezing
Though best enjoyed fresh, you can freeze the baked tart wrapped tightly in foil and placed inside a freezer bag. It will keep well for about one month. Thaw overnight in the refrigerator before reheating.
Reheating
Reheat slices in a preheated oven at 350°F (175°C) for 10 to 15 minutes. This method helps restore the puff pastry’s crispiness, unlike microwaving which can make it soggy.
FAQs
Can I use frozen puff pastry for this recipe?
Yes, frozen puff pastry works perfectly—just be sure to thaw it fully in the refrigerator before rolling it out to avoid tearing.
Is it necessary to caramelise the onions, or can I use raw onions?
Caramelising the onions is key because it brings out their natural sweetness and enhances the tart’s flavor profile. Raw onions would be too sharp and overpowering.
Can I substitute feta with another type of cheese?
Go for cheeses like goat cheese or ricotta if you prefer a milder flavor. Each will add a different creamy texture, but feta’s tang is hard to beat in this tart.
Is this tart suitable for a vegetarian diet?
Absolutely! This Sweet Potato, Feta & Caramelised Onion Tart Recipe is vegetarian-friendly and makes a fantastic meat-free main or appetizer.
How can I make the puff pastry edges extra crispy?
Brush the edges with beaten egg before baking and make sure your oven is fully preheated. This creates a beautiful golden, crisp finish on the pastry borders.
Final Thoughts
This Sweet Potato, Feta & Caramelised Onion Tart Recipe is one of those dishes that brings immediate warmth and delight to your table. Its balance of flavors is so thoughtfully layered, and yet it’s incredibly easy to pull together. Whether you’re feeding family or impressing guests, this tart is a true crowd-pleaser you’ll be excited to make again and again. Give it a try and watch it become a cherished favorite in your kitchen!
Print
Sweet Potato, Feta & Caramelised Onion Tart Recipe
- Total Time: 50 minutes
- Yield: 4 servings 1x
- Diet: Vegetarian
Description
A delicious Mediterranean-inspired tart featuring thinly sliced sweet potatoes, caramelised onions, and crumbled feta cheese on a flaky puff pastry base. This savory tart is perfect as a main course or appetizer and combines sweet and tangy flavors with a crispy, golden crust.
Ingredients
Pastry
- 1 sheet puff pastry (thawed)
Filling
- 1 large sweet potato (peeled and thinly sliced)
- 2 tablespoons olive oil (divided)
- 2 medium onions (thinly sliced)
- 1 tablespoon balsamic vinegar
- 1 teaspoon sugar
- 1/2 cup crumbled feta cheese
- 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried)
- Salt and black pepper to taste
Optional
- 1 egg (beaten, for egg wash)
Instructions
- Caramelise Onions: Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper. In a skillet over medium heat, heat 1 tablespoon olive oil. Add the thinly sliced onions and cook slowly for 10–15 minutes, stirring often, until they become golden and soft. Add balsamic vinegar and sugar, then cook for another 2–3 minutes to develop a rich, sweet flavor. Remove from heat and set aside.
- Prepare Sweet Potatoes: Toss the thinly sliced sweet potatoes with the remaining 1 tablespoon of olive oil, salt, and pepper to ensure they are well-coated and seasoned.
- Prepare Puff Pastry: Roll out the thawed puff pastry sheet onto the prepared baking sheet. Score a 1-inch border around the edge of the pastry carefully with a knife, ensuring not to cut all the way through. Prick the center of the pastry all over with a fork to prevent excessive puffing.
- Assemble the Tart: Evenly spread the caramelised onions over the center of the pastry, staying within the scored border. Layer the sweet potato slices on top in a slightly overlapping pattern to cover the onions. Sprinkle crumbled feta cheese and fresh thyme leaves evenly over the sweet potatoes. If using, brush the edges of the tart with the beaten egg to achieve a glossy, golden finish while baking.
- Bake the Tart: Place the tart in the preheated oven and bake for 25–30 minutes or until the pastry is golden brown, puffed, and the sweet potatoes are tender.
- Serve: Let the tart cool slightly before slicing. Serve warm or at room temperature. Optionally, drizzle with honey or top with a handful of fresh arugula for added freshness and flavor.
Notes
- Great served warm or at room temperature.
- You can add a drizzle of honey on top for a touch of sweetness.
- A handful of fresh arugula adds a peppery contrast.
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Category: Main Course, Appetizer
- Method: Baking
- Cuisine: Mediterranean-Inspired
