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Healthy / Moist Leek Tart with Gruyere and Onions

Moist Leek Tart with Gruyere and Onions

January 19, 2026 by Tiffany

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If you’re looking for a dish that feels like a warm hug on a plate, then the Moist Leek Tart with Gruyere and Onions is just what you need. This savory tart combines a creamy filling with a flaky crust, making it a favorite in my kitchen. Whether it’s a busy weeknight dinner or a cozy family gathering, this comforting recipe never fails to impress. You’ll love how easy it is to whip up, and the delightful aroma will have everyone coming together at the table in no time.

What makes this tart special is its versatility. You can enjoy it hot or cold, and it pairs beautifully with a simple salad or even as part of a larger spread. It’s perfect for any occasion when you want to share something delicious without spending all day in the kitchen.

Why You’ll Love This Recipe

  • Simple Preparation: This recipe is straightforward, making it perfect for even beginner cooks.
  • Family Friendly: The flavors appeal to both kids and adults, ensuring everyone leaves the table happy.
  • Make-Ahead Option: You can prepare it in advance and bake it just before serving, saving time on busy days.
  • Delicious Flavor: The combination of leeks, Gruyere cheese, and creamy filling creates an irresistible taste that will keep you coming back for more.
Moist

Ingredients You’ll Need

Gathering your ingredients is half the fun! For this Moist Leek Tart with Gruyere and Onions, you’ll need some simple and wholesome items that are likely already in your pantry. Here’s what you’ll need:

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For the Crust

  • 180 gr Plain Flour
  • 1 pinch Salt
  • 90 gr Unsalted Butter, very cold
  • 60 ml Cold Water

For the Filling

  • 2 Leeks
  • 1 small Brown Onion
  • 30 gr Unsalted Butter or Olive Oil
  • 0.5 teaspoon Minced Garlic
  • 2 large Eggs
  • 120 ml Heavy / Thickened Cream
  • 1 teaspoon Table Salt
  • 0.5 teaspoon Pepper
  • 1 teaspoon Ground Cumin (optional)
  • 35 gr Gruyere Cheese, grated

Variations

One of the best parts about this Moist Leek Tart with Gruyere and Onions is its flexibility! Feel free to get creative with different ingredients to suit your taste or whatever you have on hand.

  • Add extra veggies: Toss in some spinach or mushrooms for added nutrition and flavor.
  • Change up the cheese: Swap Gruyere for another cheese like cheddar or feta if you prefer.
  • Herb infusion: Add fresh herbs like thyme or parsley for an aromatic twist.
  • Make it gluten-free: Use a gluten-free flour blend for the crust to accommodate dietary needs.

How to Make Moist Leek Tart with Gruyere and Onions

Step 1: Prepare the Crust

Start by making your crust. In a bowl, combine the plain flour and salt. Cut in the cold unsalted butter until the mixture resembles coarse crumbs. Gradually add cold water until the dough comes together. Wrap it in plastic wrap and chill in the refrigerator while you prepare your filling. Chilling helps create that flaky texture we all love!

Step 2: Sauté Your Veggies

In a pan over medium heat, melt 30 grams of unsalted butter (or use olive oil) and add sliced leeks and chopped brown onion. Sauté them along with minced garlic until they are soft and slightly caramelized—about 5-7 minutes. This step brings out their natural sweetness, enhancing the overall flavor of your tart.

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Step 3: Whisk Together Filling Ingredients

In a mixing bowl, whisk together two large eggs, heavy cream, salt, pepper, and ground cumin (if using). Stir in your sautéed leeks and onions along with grated Gruyere cheese until well combined. This creamy mixture will be what makes your tart so moist and flavorful!

Step 4: Assemble Your Tart

Roll out your chilled dough on a lightly floured surface until it’s about 3mm thick. Carefully transfer it into your tart pan and trim any excess dough hanging over the edges. Pour your leek mixture into the crust evenly.

Step 5: Bake to Perfection

Preheat your oven to 375°F (190°C) while you let everything settle into place. Bake your tart for about 30 minutes or until it’s golden brown on top and set in the center. The aroma will fill your kitchen—it’s simply irresistible!

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Now you’re ready to slice into this delicious Moist Leek Tart with Gruyere and Onions! Enjoy every bite; I know I always do!

Pro Tips for Making Moist Leek Tart with Gruyere and Onions

Creating the perfect Moist Leek Tart with Gruyere and Onions is easy when you follow a few handy tips!

  • Use cold ingredients: Starting with cold butter and water helps create a flaky crust. The cold temperature prevents the butter from melting too quickly, allowing for those delightful layers in the pastry.

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  • Don’t rush the leeks: Sautéing the leeks and onions until they are soft and slightly caramelized brings out their natural sweetness. This depth of flavor will enhance the overall taste of your tart.

  • Let it cool before slicing: Allowing the tart to cool for about 10-15 minutes after baking makes it easier to cut into neat slices. This also gives the filling time to set up a bit more, making every slice look picture-perfect.

  • Experiment with cheese: While Gruyere is delicious, feel free to mix in other cheeses like feta or mozzarella for added creaminess or tang. This can give your tart a unique twist and cater to different taste preferences.

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  • Add herbs for freshness: Toss in some fresh herbs like thyme or parsley before serving for an aromatic touch that brightens up the dish. It not only enhances flavor but also adds a pop of color!

How to Serve Moist Leek Tart with Gruyere and Onions

Serving this delicious tart is as enjoyable as making it! Here are some ideas on how to present this delightful dish.

Garnishes

  • Fresh herbs: A sprinkle of chopped chives or parsley on top not only adds color but also provides a fresh contrast to the creamy filling.
  • Lemon zest: A little lemon zest grated over the top just before serving can brighten the flavors, making each bite even more enticing.

Side Dishes

  • Mixed Green Salad: A light salad with arugula, spinach, and a simple vinaigrette offers a refreshing counterpoint to the richness of the tart.
  • Roasted Vegetables: Seasonal roasted vegetables such as carrots, bell peppers, or zucchini add vibrant colors and additional nutrition. The caramelization from roasting enhances their natural sweetness.
  • Quinoa Pilaf: A fluffy quinoa pilaf mixed with herbs provides a wholesome texture that complements the tart beautifully. It’s also gluten-free!
  • Herbed Potatoes: Crispy roasted or boiled potatoes tossed with fresh herbs make for a hearty side that pairs wonderfully with this savory dish.

Now that you’re equipped with these tips and serving ideas, it’s time to enjoy your culinary creation! Happy cooking!

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Make Ahead and Storage

This Moist Leek Tart with Gruyere and Onions is perfect for meal prep! You can make it ahead of time, store it, and enjoy delicious slices throughout the week.

Storing Leftovers

  • Allow the tart to cool completely before storing.
  • Wrap individual slices in plastic wrap or place in an airtight container.
  • Store in the refrigerator for up to 3 days.

Freezing

  • Once cooled, wrap the entire tart tightly in plastic wrap, then in aluminum foil.
  • Alternatively, slice the tart and wrap individual portions.
  • Freeze for up to 2 months; just be sure to label with the date!

Reheating

  • Preheat your oven to 350°F (175°C).
  • Place the tart on a baking sheet and cover with foil to prevent over-browning.
  • Heat for about 15-20 minutes or until warmed through. For crispy edges, remove the foil during the last 5 minutes.

FAQs

Here are some common questions about making this delicious tart.

How can I make my Moist Leek Tart with Gruyere and Onions gluten-free?

You can substitute plain flour with a gluten-free all-purpose flour blend. Ensure that it contains xanthan gum for proper texture!

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Can I use different cheeses in my Moist Leek Tart with Gruyere and Onions?

Absolutely! Feel free to experiment with cheeses like cheddar or feta for a unique twist. Just keep in mind that flavors may change accordingly.

What can I serve with my Moist Leek Tart?

This tart pairs well with a fresh green salad or roasted vegetables for a balanced meal. Enjoy it as a light lunch or dinner option!

Can I add other vegetables to this leek tart recipe?

Yes! Spinach, mushrooms, or bell peppers would work beautifully. Just sauté them along with the leeks and onions.

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Final Thoughts

This Moist Leek Tart with Gruyere and Onions is not just a recipe; it’s a comforting dish that brings warmth and joy to any table. I hope you find as much pleasure in making it as I do sharing it! Enjoy your cooking adventure, and don’t hesitate to share your experiences or variations—you might inspire someone else!

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Moist Leek Tart with Gruyere and Onions

Moist Leek Tart with Gruyere and Onions
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If you’re in search of a dish that embodies comfort and flavor, the Moist Leek Tart with Gruyere and Onions is the perfect choice. This savory tart features a creamy filling surrounded by a flaky crust, making it an ideal centerpiece for any meal. Whether enjoyed warm or cold, it pairs beautifully with a fresh salad or can be served as part of a larger feast. Its simplicity in preparation means even novice cooks can impress family and friends with this delicious creation. The combination of leeks, Gruyere cheese, and wholesome ingredients ensures each bite is rich in flavor while being easy to whip up on busy weeknights.

  • Author: Tiffany
  • Prep Time: 20 minutes
  • Cook Time: 30 minutes
  • Total Time: 50 minutes
  • Yield: Serves 8
  • Category: Lunch
  • Method: Baking
  • Cuisine: French

Ingredients

Scale
  • 180g plain flour
  • 90g unsalted butter (very cold)
  • 60ml cold water
  • 2 leeks
  • 1 small brown onion
  • 30g unsalted butter or olive oil
  • 2 large eggs
  • 120ml heavy cream
  • 35g grated Gruyere cheese
  • 1 pinch salt
  • 0.5 teaspoon minced garlic
  • 1 teaspoon table salt
  • 0.5 teaspoon pepper
  • 1 teaspoon ground cumin (optional)

Instructions

  1. For the crust, combine plain flour and salt in a bowl. Cut in cold unsalted butter until crumbly, then add cold water gradually until dough forms. Chill in the refrigerator.
  2. Sauté sliced leeks and chopped onion in melted butter (or olive oil) over medium heat until soft (about 5-7 minutes). Add minced garlic towards the end.
  3. In a bowl, whisk together eggs, heavy cream, salt, pepper, and optional cumin. Stir in sautéed veggies and grated Gruyere until combined.
  4. Roll out chilled dough to fit a tart pan and fill with the leek mixture.
  5. Bake at 375°F (190°C) for around 30 minutes until golden brown on top.

Nutrition

  • Serving Size: 1 slice (110g)
  • Calories: 295
  • Sugar: 1g
  • Sodium: 350mg
  • Fat: 20g
  • Saturated Fat: 10g
  • Unsaturated Fat: 9g
  • Trans Fat: 0g
  • Carbohydrates: 22g
  • Fiber: 1g
  • Protein: 7g
  • Cholesterol: 115mg

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