Leek and Onion Tart with Gruyere

A savory tart filled with sweet caramelized leeks and onions, topped with nutty Gruyere cheese. Perfect for a light lunch, brunch, or appetizer.

Prep Time

20 minutes

Total Time

1 hour

Calories

535 kcal

Difficulty

Medium

Equipment

3 items

Cost

£2.10/serving

Season:

Meal Type:

Cuisine:

Mood:

Ingredients

Servings

3mediumLeeks(white and light green parts only, thoroughly washed and thinly sliced)

£2.00

2mediumYellow Onions(thinly sliced)

£0.80

4tablespoonsButter(unsalted)

£0.60

2tablespoonsOlive Oil(extra virgin)

£0.30

0.3cupDry White Wine(optional, use vegetable broth if preferred)

£1.00

1teaspoonFresh Thyme(chopped)

£0.75

0.5teaspoonSalt(or to taste)

£0.05

0.3teaspoonBlack Pepper(or to taste)

£0.10

4ouncesGruyere Cheese(shredded)

£2.50

2largeEggs

£0.70

0.5cupHeavy Cream

£0.80

114.1 oz packageRefrigerated Pie Crust(or homemade shortcrust pastry)

£3.00

Total Cost

£12.60

£2.10 per serving

Instructions

1.
Preheat oven to 375°F (190°C).
2.
In a large skillet over medium heat, melt butter with olive oil. Add leeks and onions, season with salt and pepper. Cook, stirring occasionally, until softened and caramelized, about 25-30 minutes. Reduce heat if needed to prevent burning.
3.
If using, add white wine and cook for another 2-3 minutes, scraping up any browned bits from the bottom of the pan. Stir in thyme.
4.
While the leeks and onions are cooking, unroll pie crust and fit it into a 9-inch tart pan, trimming any excess dough. Prick the bottom of the crust with a fork.
5.
In a medium bowl, whisk together eggs and heavy cream. Season with salt and pepper.
6.
Spread the caramelized leek and onion mixture evenly over the pie crust.
7.
Sprinkle the shredded Gruyere cheese over the leek and onion mixture.
8.
Pour the egg and cream mixture evenly over the leeks, onions, and cheese.
9.
Bake for 30-40 minutes, or until the crust is golden brown and the filling is set. A knife inserted near the center should come out clean.
10.
Let the tart cool slightly before slicing and serving.

Buy ingredients on Loop

My Notes

Nutrition Information

Nutrition per serving (175g)

535 kcal / 2238 kJ

Carbs

34g

13% of RDA

Fat

38g

54% of RDA

Protein

15g

30% of RDA

Detailed Breakdown

Fibre

3 g

10% of RDA

Sugar

8 g

9% of RDA

Sodium

480 mg

21% of RDA

Saturated Fat

22 g

110% of RDA

Chef's Tips

For a deeper flavor, caramelize the leeks and onions for a longer period of time.

If the crust is browning too quickly, cover the edges with foil.

Feel free to add other vegetables to the tart, such as mushrooms or asparagus.

The tart can be made ahead of time and reheated before serving.

Cooking Equipment

Oven

Stovetop

9-inch Tart Pan

Wine Pairings

No wine pairing suggestions available for this recipe.

Share this recipe

Loading recipe...

Leek and Onion Tart with Gruyere

Ingredients

Instructions