Onion and Feta Cheese Tart

Bill Granger’s onion and feta cheese tart is simple and elegant. Using store-bought puff pastry makes it a cinch to put together–the most time-consuming part is caramelizing the onions. Sprinkled with feta cheese and oregano, the Mediterranean flavors are the perfect accompaniment to a simple green salad.

A white rectangular platter with a puff pastry tart filled with caramelized onions, feta cheese, and oregano.

Brown or yellow onions are best for cooking this tart as they have a stronger flavor than the sweeter red or white onions, which are better in salads. I suggest putting the onions on in little dollops and gently smoothing them out because spreading it roughly, you’ll push all the cheese over to one side.–Bill Granger

Onion and Feta Cheese Tart

A white rectangular platter with a puff pastry tart filled with caramelized onions, feta cheese, and oregano.
This recipe isn't fiddly–it's simple, impressive, and delicious. The combination of caramelized onions and feta is classic, especially combined with puff pastry. It makes a perfect accompaniment to a crisp green salad.
Bill Granger

Prep 30 mins
Cook 45 mins
Total 1 hr 15 mins
Appetizer
American
6 servings
681 kcal
5 from 1 vote
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Ingredients 

  • 2 tablespoons olive oil
  • 2 pounds 4 ounces onions finely sliced
  • 1 tablespoon soft brown sugar
  • 2 tablespoons balsamic vinegar
  • 1 teaspoon sea salt
  • Freshly ground black pepper
  • 1 (13-ounce)packet puff pastry
  • 1/2 cup finely grated Parmesan cheese
  • 5 1/2 ounces feta cheese crumbled
  • 2 tablespoons oregano leaves

Directions
 

  • Place the olive oil and onions in a saucepan over medium heat and cook for 20 minutes, stirring occasionally. Add the sugar, balsamic vinegar, salt, and pepper.
  • Cook the mixture for another 5 minutes, or until the onions are soft and caramelized. Remove from the heat and set aside to cool.
  • Preheat the oven to 425°F (220°C).
  • Roll out the pastry to an 8-x-16-inch rectangle on a lightly floured surface. Trim the edges with a sharp knife and place on a baking tray lined with parchment paper. Score a 1/4 inch border around the edge of the pastry, taking care not to cut all the way through to the bottom. Prick the pastry with a fork and sprinkle the Parmesan cheese within the scored edges.
  • Place the onion on top of the pastry base, again within the scored edges. Bake in the oven for 20 to 25 minutes, or until the pastry is puffed and golden brown. Remove from the oven and sprinkle with the feta cheese and oregano leaves.
  • Serve warm with a crispy salad.
Print RecipeBuy the Bills Open Kitchen cookbook

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Notes

How do I make caramelized onions without burning them?

First of all, take your time. Onions have to be cooked low and slow for at least 30 minutes to be properly caramelized. Don’t be tempted to turn up the heat to get it going faster–you’ll regret it. You need to cook them for a long time so the moisture evaporates and the sugars from the onions start to caramelize, this happens slowly so just keep at it.

How to make smaller or individual tarts

This tart makes a lovely lunch but it also makes a nice appetizer. If you prefer the look of small tarts to slices of a big one, you can adjust this to make individual tarts by cutting the pastry into squares. Proceed in the same way by scoring and filling, but cut back the baking time by 10 minutes.

Do these tarts travel well?

Extremely! But if you’re going to be traveling with your tart, you can wait to garnish with the cheese and oregano until serving, if you please.

Show Nutrition

Serving: 1portionCalories: 681kcal (34%)Carbohydrates: 58g (19%)Protein: 15g (30%)Fat: 44g (68%)Saturated Fat: 14g (88%)Polyunsaturated Fat: 5gMonounsaturated Fat: 23gCholesterol: 30mg (10%)Sodium: 1017mg (44%)Potassium: 354mg (10%)Fiber: 5g (21%)Sugar: 12g (13%)Vitamin A: 214IU (4%)Vitamin C: 13mg (16%)Calcium: 298mg (30%)Iron: 3mg (17%)

Recipe Testers’ Reviews

I love savory tarts, and this recipe confirms why. Puff pastry, crisp and light, topped with caramelized onions and cheese is simply a match made in heaven. To save time, I used my food processor to slice the onions thinly and 20 minutes later, with the help of a little olive oil and a giant cast iron skillet, they were caramelized perfectly. The balsamic and brown sugar take them over the top.

Working with puff pastry feels like I’m cheating. It takes minutes to roll it out and you score it and poke it with a fork, and you have a canvas for your onions and cheese. This is super simple and so delicious. You can also sub in goat cheese for the feta. You’ll be glad you did.

I served this with a salad using Leite’s creamy shallot vinaigrette. I used feta on one half, goat cheese on the other. Hands down, goat cheese wins!

Absolutely a winning tart! And it’s OK if you want to call this lovely pizza-adjacent gem a pissaladière or a super easy version of flammkuchen or just a brilliant idea from Bill Granger. I’m perfectly happy to use a package of DuFour puff pastry which actually unfolds nearly exactly the size you need (it is a 14 oz package, so with rolling to flatten it, you can have a slightly more generous tart and I divided mine in two as I did not have quite enough feta for the full recipe). I made one 9×9 inch tart with the caramelized onions and feta, and a second one with spiced chorizo and cheese with zucchini version and baked them side by side.  

This is perfect picnic fare or impromptu entertaining. I defrosted the puff pastry in the refrigerator in the afternoon, no more ahead planning was needed. To cook the onions, using half the recipe in a wide sauté pan (9.5 inch) over medium heat was perfect—I did adjust the temp once or twice, so as to not scorch, and in a pinch, you can mist the pan which also helps pick up the fond. The onions were colouring nicely by the time I added the sugar, balsamic, salt, and pepper. You do NOT want to wander away tho, as at a medium heat this is a bit more aggressive than I usually might caramelize onions, and you want to stir often. 

While the onions are cooling (remove them to a pie plate to help that along), the oven has plenty of time to come to temp and you can prep the cheese and oregano and only at the last moment with everything else in place, bring the puff pastry out to work with. A generous dusting of flour on a sheet of parchment helps, and I unfolded and divided both the pieces and having also lightly dusted the rolling pin and top, could invert them and it released neatly onto two quarter sheet pans.

I appreciated the chance to use a rather abundant and enthusiastic home patch of oregano, and the fresh oregano really works with this combination. 25 minutes gave me puffy edges, nice browning, and the bottom of the puff pastry had enough firmness to pick up by hand. Since this was enough to serve 4-6, it also was enough for leftovers for breakfast/lunch the next day (move over pizza-for-brekkie, there’s a new bite in town). 

Tricks I learned? The Parmesan base (used a fine grating, so it was a nice fluffy and fine layer) prevents the onion layer from making the bottom soggy in any way, even for the leftover portions. I borrowed that trick for the second one and used grated queso first before adding the meat and zucchini.  

Originally published September 18, 2005

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Comments

  1. 5 stars
    I have to admit that I wasn’t too sure about the recipe when I first read it. I just gave it a go because I had some puff pastry at home and feta cheese that had to be eaten as soon. However, I had the most wonderful surprise with all the wonderful flavours combined. Plus it is dead simple to make.

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