Description

Moist Leek Tart with Gruyère and Onions is a savory dish that combines the richness of Gruyère cheese, the delicate sweetness of caramelized leeks and onions, and the flakiness of a buttery pastry crust. Perfect for a light lunch, side dish, or appetizer.

Ingredients

For the Pastry:

180 grams all-purpose flour

Pinch of salt

90 grams cold unsalted butter, cubed

60 ml chilled water

For the Filling:

2 leeks, cleaned and thinly sliced

1 small yellow onion, thinly sliced

30 grams unsalted butter (or olive oil)

2 large eggs

120 ml thick cream (heavy cream or half-and-half)

1 teaspoon regular salt

½ teaspoon black pepper

1 teaspoon ground cumin (optional)

35 grams Gruyère cheese, shredded

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Instructions

Prepare the Pastry: In a food processor, combine the flour and salt. Add cold butter and pulse until the mixture resembles breadcrumbs. Gradually add chilled water, a little at a time, until the dough comes together. Roll the dough into a disk, wrap it in plastic, and chill in the fridge for at least an hour.
Prepare the Tart Shell: After chilling, roll the dough onto lightly floured baking paper. Line your tart pan with the dough and prick the base with a fork. Chill for another 30 minutes, then freeze the shell for 15 minutes before blind baking it in a 350°F (180°C) oven for 10-15 minutes. Set the tart shell aside to cool.
Cook the Leeks and Onions: In a large pan, melt butter over medium heat. Add the sliced leeks, onions, and garlic, and sauté for about 5 minutes until softened and translucent. Remove from heat and allow the mixture to cool slightly.
Prepare the Filling: In a mixing bowl, whisk together eggs, cream, salt, pepper, and cumin (if using). Stir in the sautéed leeks and onions, followed by the shredded Gruyère cheese.
Assemble the Tart: Pour the leek and cheese mixture into the pre-baked tart shell. Bake for 25-35 minutes at 350°F (180°C) until the filling is set and golden on top.
Serve: Let the tart cool slightly before serving. It can be enjoyed warm or at room temperature for the best flavor.

Notes

If you’re short on time, you can use store-bought pastry dough for the crust.

This recipe is already vegetarian! For a vegan version, substitute with plant-based butter, cream, and vegan cheese alternatives.

Feel free to experiment with other cheeses such as cheddar or goat cheese for different flavors.

If you can’t find Gruyère, Comté or even mild cheddar are good alternatives.

For a more colorful tart, add vegetables like spinach or mushrooms.

Prep Time: 20 minutes (for pastry)
Cook Time: 1 hour
Category: Main Dish
Method: Baking
Cuisine: French

Nutrition

Serving Size: 1 slice
Calories: 350
Sugar: 5g
Sodium: 500mg
Fat: 22g
Saturated Fat: 12g
Unsaturated Fat: 7g
Trans Fat: 0g
Carbohydrates: 30g
Fiber: 3g
Protein: 8g
Cholesterol: 95mg