If you’re looking for a dish that beautifully combines earthy sweetness, tangy creaminess, and a luscious flaky crust, then this Sweet Potato, Feta & Caramelised Onion Tart Recipe is exactly what you need. It’s a delightful harmony of flavors and textures where tender roasted sweet potatoes meet the savory punch of caramelised onions and the salty brightness of feta cheese, all nestled within buttery puff pastry. Perfect for a cozy dinner or a special gathering, this tart never fails to impress and will quickly become a beloved go-to in your recipe collection.
Ingredients You’ll Need
These simple yet powerful ingredients are the heart and soul of this tart, each bringing something essential to the plate—from the flaky puff pastry base to the sweet, caramelised onions that add depth, and the creamy feta that gives the perfect finishing touch.
- 1 sheet puff pastry (thawed): The golden, flaky foundation that holds all the delicious toppings together.
- 2 medium sweet potatoes (peeled and sliced into thin rounds): Roasted to tender perfection, they add natural sweetness and vibrant color.
- 2 tablespoons olive oil: Used for roasting and caramelising to bring out rich flavors and a lovely texture.
- Salt and pepper to taste: Essential for seasoning every layer, balancing out the sweetness and the tang.
- 2 large onions (thinly sliced): Slowly caramelised to add a deep, sweet, and savory element.
- 1 tablespoon balsamic vinegar: Adds a subtle tang that enhances the onions’ sweetness.
- 1 teaspoon sugar: Helps to speed up caramelisation and deepen the flavor of onions.
- 1/2 teaspoon dried thyme: Infuses a delicate herbal note complimenting the sweetness of the potatoes.
- 1/2 cup crumbled feta cheese: Brings creamy, salty bursts that perfectly contrast the sweet potatoes.
- 1 egg (beaten, for egg wash): Creates a beautiful golden and shiny border on the tart.
- 1 teaspoon fresh thyme leaves (optional for garnish): Fresh herbs for a pop of color and an extra layer of fragrance.
How to Make Sweet Potato, Feta & Caramelised Onion Tart Recipe
Step 1: Roast the Sweet Potatoes
Start by preheating your oven to 400°F (200°C) and lining a baking sheet with parchment paper. Toss those beautifully sliced sweet potato rounds with 1 tablespoon of olive oil, salt, pepper, and the dried thyme. Spread them out evenly on a separate tray and roast for about 20 minutes until they’re tender and just starting to caramelise around the edges. This roasting unlocks their natural sweetness while keeping them firm enough to layer on the tart.
Step 2: Caramelise the Onions
While the sweet potatoes roast, heat the remaining tablespoon of olive oil in a skillet over medium heat. Add the thinly sliced onions and cook slowly, stirring occasionally, for 15 to 20 minutes until they turn a gorgeous deep golden brown. Once caramelised, stir in the balsamic vinegar and sugar and cook for another couple of minutes. This process builds that rich, sweet-savory base that makes this tart unforgettable. Set aside to cool slightly.
Step 3: Prepare the Pastry
Unroll the thawed puff pastry onto the baking sheet lined with parchment paper. Using a knife, lightly score a 1-inch border all around the pastry—but be careful not to cut all the way through. This border will puff up and give your tart that classic edge. Brush the border generously with the beaten egg wash for that beautiful golden finish during baking.
Step 4: Assemble the Tart
Spread the caramelised onions evenly within the scored border. Next, layer the roasted sweet potato slices on top of the onions, arranging them neatly and slightly overlapping for a visually stunning effect. Sprinkle the crumbled feta cheese generously over the top, adding salty goodness that perfectly complements the sweet and savory layers beneath.
Step 5: Bake to Perfection
Slide your tart into the oven and bake for 20 to 25 minutes or until the puff pastry is puffed, golden, and irresistibly flaky. Once baked, if you have fresh thyme leaves on hand, sprinkle them on top for that vibrant, herbal aroma and visual appeal. Let the tart cool for a few minutes before cutting so all those wonderful flavors can settle.
How to Serve Sweet Potato, Feta & Caramelised Onion Tart Recipe
Garnishes
Fresh thyme leaves are a natural garnish, adding a touch of earthiness and bright green pops of color. For an extra burst of freshness, a handful of peppery arugula or baby spinach scattered on top just before serving works beautifully. A quick drizzle of good-quality olive oil can also elevate the flavors.
Side Dishes
This tart pairs wonderfully with simple green salads dressed in lemon vinaigrette or a light tomato and cucumber salad for a refreshing balance. Roasted or steamed vegetables on the side make for a wholesome and colorful plate. If you prefer something heartier, serve it alongside a bowl of warm lentil soup for a cozy and wholesome meal.
Creative Ways to Present
For a party or special occasion, consider slicing the tart into small squares or rectangles and serving as elegant finger food. Top each piece with a tiny dollop of Greek yogurt blended with herbs for a refreshing contrast. You can also make mini individual tarts using puff pastry circles, perfect for sharing and making a stylish appetizer.
Make Ahead and Storage
Storing Leftovers
This tart keeps really well in the fridge, stored in an airtight container for up to three days. Simply cover tightly to maintain freshness and prevent the pastry from becoming soggy. Leftover slices can be enjoyed cold or reheated with ease.
Freezing
If you want to prepare this Sweet Potato, Feta & Caramelised Onion Tart Recipe in advance, you can freeze it after baking. Wrap individual slices tightly in plastic wrap and then again in foil, or place them in a freezer-safe container. Frozen tart slices last up to one month and are perfect for a quick meal later on.
Reheating
To reheat, preheat your oven to 350°F (175°C). Place slices on a baking tray and warm for 10 to 15 minutes until heated through and the pastry crisp again. Avoid microwaving to keep the puff pastry flaky and delicious.
FAQs
Can I substitute feta cheese with another cheese?
Absolutely! Goat cheese or ricotta are excellent alternatives that complement the sweet potatoes beautifully. These will change the flavor profile slightly but still maintain the creamy, tangy contrast that feta provides.
Is this tart vegetarian and gluten-free?
This Sweet Potato, Feta & Caramelised Onion Tart Recipe is vegetarian, but it contains gluten due to the puff pastry. To make it gluten-free, you could experiment with gluten-free puff pastry or a different gluten-free dough base.
Can I prepare the caramelised onions ahead of time?
Yes! Caramelised onions can be made up to three days in advance and stored in the refrigerator. This is a huge time saver and lets the flavors deepen even more before assembling your tart.
What’s the best way to slice sweet potatoes for this tart?
Try to slice the sweet potatoes as thinly and evenly as possible—about 1/8 inch thick. This ensures they roast evenly and layer nicely on the tart without being too bulky or undercooked.
Can I make mini tarts using this recipe?
Yes, you can create mini versions by cutting puff pastry into smaller circles or squares. Adjust the roasting time for sweet potatoes accordingly and bake the mini tarts about 12 to 15 minutes or until golden and cooked through.
Final Thoughts
This Sweet Potato, Feta & Caramelised Onion Tart Recipe is one of those dishes that brings warmth and comfort with every bite, while also impressing with its combination of luscious flavors and textures. Whether you’re looking to wow guests or treat yourself to a special meal, it’s a recipe worth making again and again. Go ahead and give it a try—you’ll love how effortlessly it brings a little Mediterranean sunshine to your table!
