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Home » Main Dishes » Caramelised onion and feta tart

Caramelised onion and feta tart

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Flaky golden pastry, sweet caramelised onions, and delicious salty cheese combine in this wonderful savoury onion and feta tart. An easy, tasty family dinner!

I never seem to have the right number of onions. 

Onions are one of the vegetables that arrive weekly in our organic box – same amount every week. And yet somehow I either manage to use them all up in a couple of days, or else I barely use any onions at all and then the next week’s onions arrive and we have a huge onion surplus.

Lots of onions.

On this page...

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  • Onion overwhelm
  • What plays well with onions?
  • Onion and feta tart – ingredients
  • How to make caramelised onion and feta tart
  • What to serve with an onion and feta tart
  • Delicious for lunch or dinner
  • Caramelised onion and feta tart
  • More delicious onion recipes
  • More fabulous puff pastry tarts

Onion overwhelm

The second scenario happened recently and my onion storage tub was overflowing with onions. At this point I realised that using one onion at a time as the basis for a sauce or whatever just wasn’t going to work. I had to go all-in and make a completely onion-focused dish.

Caramelised onion and feta tart from above.

What plays well with onions?

Onions have a pungent savoury flavour coupled with a delicious sweetness that develops as the natural sugars in the vegetable caramelise on cooking. They add rich notes to all kinds of dishes but when they’re the ‘star’, as in this dish, they pair well with salty, herby and buttery flavours.

A quick look in the fridge turned up some salty feta, and a packet of puff pastry that looked like a good base to tie everything else together. And thus, this delicious caramelised onion and feta tart was born!

Caramelised onion and feta tart.

Onion and feta tart – ingredients

As I said, this delicious tart was conceived to use up a surplus of onions and used a few other bits and bobs that I had hanging around in my cupboards and fridge. It contains no exotic ingredients at all, but is truly a savoury and satisfying dish!

To make an onion and feta tart yourself, you will need:

  • onions – naturally!
  • olive oil – for frying/caramelising the onions
  • seasonings – dried thyme, fennel seeds and black pepper
  • feta cheese
  • puff pastry – can’t make a tart without pastry! I use ready-rolled because it’s just so convenient.
  • chopped parsley – optional, but it makes a lovely garnish with a fresh flavour
Ingredients for making an onion and feta tart - puff pastry, olive oil, onions, feta, fennel seeds and thyme, chopped fresh parsley.

How to make caramelised onion and feta tart

I managed to use up 5 onions in this tart. You first need to slice and caramelise the onions – caramelising them can take some time, but it’s quite a relaxing activity, and you can get on with other jobs while they look after themselves. Just come back every so often and give your onions a stir to make sure they cook evenly and don’t stick to the pan.

A cast iron frying pan containing caramelising onions as they are cooking.

Once the onions are caramelised, add the seasonings, and then assemble the tart. Simply unroll the pastry, score a border around the edge, and spread the onion mixture over. Scatter with the crumbled feta, and then pop the caramelised onion and feta tart into the oven for about 20 minutes.

Once the filling is bubbling and golden and the pastry is risen and flaky, your delicious tart is ready to eat!

Corner of caramelised onion and feta tart.

What to serve with an onion and feta tart

This wonderful caramelised onion and feta tart needs very little in the way of accompaniment. We ate it with some buttered green vegetables, but a leafy salad would also be wonderful.

The puff pastry is quite carbohydrate-dense so I didn’t serve any potatoes or other carbs with our tart. However some creamy potato salad would also be a nice addition, especially if you served it in smaller portions.

Caramelised onion and feta tart up close.

Delicious for lunch or dinner

This lovely tart can be sliced into big squares for just a few diners, or cut into many smaller squares and served as part of a lunch buffet. You can even pop a piece into a lunchbox if you need a portable meal for school or work.

Meanwhile, my family all agree that this feta and caramelised onion tart is a delicious dinner! I’ll be storing this recipe for the next time we have a surplus of onions – especially since it can be on the table in under an hour – yay!

Depending on what you serve with it (see above) this tart serves 4-6 people.

Caramelised onion and feta tart. Flaky golden pastry, sweet caramelised onions, and delicious salty cheese combine in this wonderful savoury onion and feta tart. An easy, tasty family dinner!

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📖 Recipe

Corner of caramelised onion and feta tart.

Caramelised onion and feta tart

Prevent your screen from going dark
Flaky golden pastry, sweet caramelised onions, and delicious salty cheese combine in this wonderful savoury onion and feta tart.
4.86 from 7 votes
Print Recipe Pin Recipe Save Saved!
Prep Time 35 minutes mins
Cook Time 20 minutes mins
Total Time 55 minutes mins
Course Main Course
Cuisine European
Servings 6
Calories 487 kcal

Ingredients
 
 

  • 5 medium onions
  • 3-4 tablespoon olive oil
  • ½-1 tsp dried thyme
  • 1 teaspoon fennel seeds
  • ¼ teaspoon ground black pepper (or to taste)
  • 325 g ready-rolled puff pastry
  • 200 g feta cheese, crumbled or cut into small dice
  • 1 tablespoon chopped parsley (optional)

Instructions
 

  • Peel and thinly slice the onions.
  • Heat the olive oil over a medium heat in a large skillet. Add the onions and cook, stirring occasionally, for around 25 minutes until the onions are very soft and starting to brown.
  • Add the thyme, fennel seeds and pepper to the onions and stir well. Continue to cook for a further five minutes.
  • Preheat the oven to 220°C (430°F).
  • Line a baking tray with parchment. Unroll the puff pastry onto the parchment. Use the tip of a sharp knife to score a border around the pastry, about 1cm (approx. ½ inch) from the edge.
  • Spread the onion mixture over the pastry, just up to the scored line – leave the border clear. Sprinkle the feta over the onion mixture.
  • Bake the tart at 220°C (430°F) for 20 minutes until the pastry is risen and the filling is bubbling and golden brown. Remove from the oven and sprinkle over the chopped parsley.
  • Serve the tart hot or warm.

Nutrition

Nutrition Facts
Caramelised onion and feta tart
Amount per Serving
Calories
487
% Daily Value*
Fat
 
35
g
54
%
Saturated Fat
 
11
g
69
%
Cholesterol
 
30
mg
10
%
Sodium
 
511
mg
22
%
Potassium
 
199
mg
6
%
Carbohydrates
 
35
g
12
%
Fiber
 
3
g
13
%
Sugar
 
6
g
7
%
Protein
 
10
g
20
%
Vitamin A
 
203
IU
4
%
Vitamin C
 
8
mg
10
%
Calcium
 
198
mg
20
%
Iron
 
2
mg
11
%
* Percent Daily Values are based on a 2000 calorie diet.
Keyword cheese, feta, onions, pastry
Tried this recipe?Let us know how it was!

More delicious onion recipes

If you like the look of this, but don’t have any puff pastry, you might like to try:

  • caramelised onion and feta galettes – similar flavours, in a rustic buttery tart
  • cheese and onion quiche with fennel seeds – a lovely creamy quiche with lots of sweet fried onions

More fabulous puff pastry tarts

Or if you have puff pastry but are short on onions and feta, why not try:

  • Creamy courgette puff pastry tart – Family Friends Food
  • Easy tomato puff pastry tart – Baking Queen 74
  • Tomato and fennel tart – Supper in the Suburbs
  • Puff pastry tomato tart – Sew White
Caramelised onion and feta tart on a tray.

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Comments

  1. David Simpson

    April 16, 2023 at 3:50 pm

    4 stars
    Simple and tasty recipe..I added some oregano and garlic oil to the feta and a sprinkle of walnuts too served with a small plum tomato salad with basil and balsamic.. very Mediterranean treat 😋

    Reply
    • Helen

      April 18, 2023 at 9:42 am

      Sounds delicious David! Love the walnuts – will try next time I make this 🙂

      Reply
  2. Shashi

    May 20, 2021 at 3:23 pm

    My mouth is watering – this combo of sweet caramelized onions and feta with that crust sounds and looks amazing!

    Reply
    • Helen

      May 20, 2021 at 3:31 pm

      Thanks Shashi! I hope you enjoy eating it, too 🙂

      Reply
  3. Angela

    May 20, 2021 at 3:14 pm

    5 stars
    This recipe is so tasty. Such a great way to clean the frig and use up items. My kids love anything that resembles pizza. This was a hit with them!

    Reply
    • Helen

      May 20, 2021 at 3:31 pm

      Thanks Angela – great to hear that your kids enjoyed this too.

      Reply
  4. Deanne

    May 20, 2021 at 3:05 pm

    5 stars
    I’m the same way- I either have tons of onions or no onions. I love the feta cheese with this tart, too!

    Reply
    • Helen

      May 20, 2021 at 3:31 pm

      LOL – glad it’s not just me! And thanks x

      Reply
  5. Biana

    May 20, 2021 at 2:04 pm

    5 stars
    Looks so delicious! A perfect brunch dish, will be perfect with a nice, fresh salad.

    Reply
    • Helen

      May 20, 2021 at 3:20 pm

      Thanks Biana – yes, it just needs something fresh and crunchy and you’re all set!

      Reply
  6. Jen

    May 20, 2021 at 1:50 pm

    5 stars
    I love savory tarts, the sweetness of the onions with the salty feta was a divine combo. Great to serve at a party,

    Reply
    • Helen

      May 20, 2021 at 1:58 pm

      Thanks Jen! I agree, they go really well together.

      Reply
  7. Jacqueline Meldrum

    June 05, 2020 at 12:22 pm

    That looks so good. I could eat the whole thing without sharing! Thanks so much for sharing my tart. Sharing yours now!

    Reply
    • Helen

      June 05, 2020 at 12:38 pm

      Thanks Jacqueline. We ate the whole thing between four of us but I reckon two of us could have managed it!

      Reply
  8. All That I'm Eating

    June 03, 2020 at 11:40 am

    This looks SO good! I love that it almost looks like a pizza, feta and caramelised onions are always good together.

    Reply
    • Helen

      June 03, 2020 at 3:43 pm

      Thanks! I agree – they’re a great combination.

      Reply
  9. Jenn

    June 01, 2020 at 8:15 pm

    You had me at caramelised onions – omigosh, love them! This dish looks amazing – I can’t wait to try it!

    Reply
    • Helen

      June 01, 2020 at 8:22 pm

      Thanks Jenn! It’s really delish – hope you enjoy it!

      Reply
  10. Jessica Formicola

    June 01, 2020 at 8:03 pm

    Oh wow, does this look good! I am loving all of those ingredients, especially the onions!

    Reply
    • Helen

      June 01, 2020 at 8:06 pm

      Thanks Jessica. It’s a really delicious use of lots of onions.

      Reply
  11. Ashley

    June 01, 2020 at 7:55 pm

    Oh yes!!!! This sounds soooo wonderful!!! When I see my overflowing onion bin, I caramelize a ton of onions and freeze in ice cube trays!

    Reply
    • Helen

      June 01, 2020 at 8:06 pm

      Thanks Ashley! That’s such a great idea. I’m sure you could defrost some and make this tart 🙂

      Reply
  12. Cathleen @ A Taste of Madness

    June 01, 2020 at 7:44 pm

    I love how simple this recipe is. Bookmarked to make later, thank you!!

    Reply
    • Helen

      June 01, 2020 at 7:48 pm

      Thanks Cathleen! I hope you enjoy it as much as we did.

      Reply
  13. Lucy

    June 01, 2020 at 3:15 pm

    Yum this looks really delicious and is perfect for a summer meal! I’m on the no onions end of the scale this week so I’m bookmarking this to make it when I reach the other end, which could well be next week.

    Reply
    • Helen

      June 01, 2020 at 3:39 pm

      LOL! I’m glad I’m not the only person who does onions in extremes.

      Reply
  14. Emma

    June 01, 2020 at 2:24 pm

    Yum!!! Caramelised onion and feta is a great combo.

    Reply
    • Helen

      June 01, 2020 at 3:38 pm

      Thanks Emma! Agree! I love how it’s sweet, salty and savoury all at once.

      Reply
4.86 from 7 votes (2 ratings without comment)

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