Name: Sweet Potato, Feta & Caramelised Onion Tart Recipe
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: Mediterranean
Ingredients: 1 sheet puff pastry (thawed); 1 medium sweet potato (peeled and thinly sliced); 1 large red onion (thinly sliced); 1 tablespoon olive oil; 1 teaspoon balsamic vinegar; ½ teaspoon dried thyme; ½ cup crumbled feta cheese; 1 egg (beaten, for egg wash); Salt and black pepper to taste; Fresh thyme leaves for garnish (optional)

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If you’re craving a savory bake that layers delicate sweetness with tangy cheese and buttery crunch, the Sweet Potato, Feta & Caramelised Onion Tart is about to become your new obsession. Imagine crisp puff pastry piled high with melt-in-your-mouth sweet potatoes, golden caramelised onions, and pockets of creamy feta — every bite is a festival of vibrant flavors and irresistible textures. This tart is as at home at a laid-back lunch as it is starring front and center at a festive brunch, and trust me, it’s always the first thing to disappear!

Sweet Potato, Feta & Caramelised Onion Tart Recipe - Recipe Image

Ingredients You’ll Need

With just a handful of ingredients, each one pulling more than its weight in flavor, this tart is delightfully simple to put together. Every element serves a special purpose for taste, color, or that perfect flaky bite.

Puff pastry: Store-bought or homemade, its buttery layers provide the golden, crisp foundation for the tart.
Sweet potato: Thinly sliced for quick, even roasting and a pop of earthy sweetness that balances the other flavors.
Red onion: When caramelised, brings a mellow sweetness and gorgeous color contrast to the dish.
Olive oil: The key to sautéing onions to soft, silky perfection and infusing extra richness.
Balsamic vinegar: Adds a subtle tang and helps the onions caramelise beautifully.
Dried thyme: Lends Mediterranean aroma and herby depth without overpowering the main stars.
Feta cheese: Crumbled over the tart, it offers creamy, tangy pops in every bite.
Egg: Brushed on the pastry edge; this is what creates the dazzling, glossy finish you love.
Salt and black pepper: Season everything to perfection and bring all the flavors into harmony.
Fresh thyme leaves (optional): Sprinkle for a finishing touch of color and a fragrant lift.

How to Make Sweet Potato, Feta & Caramelised Onion Tart

Step 1: Prepare Your Pan and Oven

Start by preheating your oven to 400°F (200°C) and lining a baking sheet with parchment paper. This step guarantees your tart won’t stick and gives a professional, crispy bottom every time.

Step 2: Caramelise Those Onions

In a skillet over medium heat, add the olive oil and sliced red onion. Cook gently for 10–12 minutes, stirring now and then, until the onions become soft and golden. Add balsamic vinegar, dried thyme, a pinch of salt, and a twist of pepper, letting everything mingle and caramelise for another 2 minutes. You’ll know your onions are ready by the sweet, rich aroma wafting from your pan!

Step 3: Roll and Score the Puff Pastry

On a lightly floured surface, roll out the puff pastry to even out any creases. Transfer it to your prepared baking sheet, then take a sharp knife and gently score a 1-inch border all the way around — without cutting through. Prick the center all over with a fork to help the tart base stay beautifully flat as it bakes.

Step 4: Build Your Tart

Spread the caramelised onions evenly inside the scored border. Layer the sweet potato slices over the onions, overlapping slightly for a stunning visual and even baking. Sprinkle the entire surface with crumbled feta, then season with a pinch of salt and plenty of black pepper for extra oomph.

Step 5: Egg Wash and Bake

Brush the pastry edges generously with beaten egg; this is your golden ticket to a shiny, crisp crust. Slide the tray into the oven and bake for 25 to 30 minutes, or until the pastry is puffed and deep golden, and sweet potatoes are tender and just starting to caramelise at the edges.

Step 6: Finish and Serve

Once your tart is out of the oven, shower it with fresh thyme leaves if you’d like a pop of green and herbaceous fragrance. Slice into squares or wedges, and enjoy warm or at room temperature — both ways are pure bliss!

How to Serve Sweet Potato, Feta & Caramelised Onion Tart

Garnishes

To finish the Sweet Potato, Feta & Caramelised Onion Tart in style, scatter on fresh thyme leaves or try a light drizzle of honey for extra sophistication. Both options add color and a lovely flavor lift that wows at first bite.

Side Dishes

This tart loves company! Pair with a peppery arugula or baby greens salad tossed in a lemony vinaigrette for a bright, balanced meal. For a heartier spread, serve alongside a bowl of soup or a simple tomato salad.

Creative Ways to Present

For special occasions, cut your Sweet Potato, Feta & Caramelised Onion Tart into elegant finger-sized slices or squares for a brunch platter. Or use a round pastry for individual tartlets — perfect for appetizers or a make-ahead picnic treat.

Make Ahead and Storage

Storing Leftovers

If you’re lucky enough to have leftovers, let the tart cool to room temperature, then cover and refrigerate for up to 3 days. The flavors only deepen, making the next day’s slice extra delicious!

Freezing

The Sweet Potato, Feta & Caramelised Onion Tart can be frozen after baking. Wrap tightly in foil or a freezer-safe container, and freeze for up to 2 months. Thaw overnight in the fridge before reheating for best results.

Reheating

To recapture the tart’s flaky texture, reheat slices in a 350°F (175°C) oven for 10–12 minutes. The pastry will crisp up nicely, and the sweet potato and feta flavors will shine as if freshly baked.

FAQs

Can I use different cheese instead of feta?

Absolutely! While feta brings a signature tang, you can swap in goat cheese for a super-creamy finish or even crumble blue cheese for more intensity — just keep in mind that the cheese is a star ingredient in the Sweet Potato, Feta & Caramelised Onion Tart, so let your taste buds lead the way.

Can I make this tart gluten free?

Yes, just use your favorite gluten-free puff pastry (these are now widely available in many stores) and follow the same instructions — you’ll still get those lovely, flaky layers that make this tart unforgettable.

What other vegetables work in this tart?

This tart is endlessly adaptable! Try thinly sliced zucchini, butternut squash, or roasted red peppers as part of, or instead of, the sweet potato layer for a new twist on the Sweet Potato, Feta & Caramelised Onion Tart.

How do I stop the pastry from getting soggy?

Scoring a border and pricking the pastry’s base help it bake crisp, while caramelised onions act as a natural barrier for moisture. Also, pre-roasting very watery vegetables before adding them keeps everything perfectly flaky.

Can I serve this tart cold?

Yes, the Sweet Potato, Feta & Caramelised Onion Tart tastes fantastic at room temperature or even chilled! It makes a lovely addition to picnics, lunchboxes, or a quick work-from-home lunch.

Final Thoughts

There’s a certain magic in pulling a golden, bubbling tart from the oven, and this Sweet Potato, Feta & Caramelised Onion Tart never fails to impress. It’s approachable enough for a weekday dinner yet gorgeous enough for sharing with friends. I hope you give this a spot in your kitchen soon — your table (and your taste buds) will thank you!

Sweet Potato, Feta & Caramelised Onion Tart Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

4.5 from 15 reviews

Author: admin
Total Time: 50 minutes
Yield: 4 servings 1x
Diet: Vegetarian

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Description

This Sweet Potato, Feta & Caramelised Onion Tart is a delightful vegetarian main course that combines the sweetness of caramelized onions and tender sweet potatoes with the saltiness of feta cheese, all baked on a flaky puff pastry crust.

Ingredients

Scale

Puff Pastry:

1 sheet puff pastry (thawed)

Sweet Potato:

1 medium sweet potato (peeled and thinly sliced)

Red Onion Mixture:

1 large red onion (thinly sliced)
1 tablespoon olive oil
1 teaspoon balsamic vinegar
½ teaspoon dried thyme

Feta Cheese:

½ cup crumbled feta cheese

Egg Wash:

1 egg (beaten, for egg wash)

Seasoning:

Salt and black pepper to taste

Garnish:

Fresh thyme leaves for garnish (optional)

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Instructions

Preheat the Oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Caramelize Onions: In a skillet, cook red onion in olive oil until soft. Add balsamic vinegar, thyme, salt, and pepper; cook for 2 minutes. Set aside.
Prepare Pastry: Roll out puff pastry on a floured surface, transfer to baking sheet, score edges, and prick center.
Assemble Tart: Spread caramelized onions inside the border. Arrange sweet potato slices over onions, sprinkle with feta, season, and brush edges with egg wash.
Bake: Bake for 25-30 minutes until golden. Garnish with thyme.
Serve: Slice and serve warm or at room temperature.