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Tender leeks melted in butter until sweet, folded into silky custard with aged Gruyère, and baked in a shatteringly flaky crust that speaks of French farmhouse kitchens and unhurried weekend mornings.
Start with the leeks. They should feel heavy in your hand, their white and pale green parts tight and unblemished. Leeks are at their sweetest from late autumn through early spring, when cold nights concentrate their sugars. If your market has them with roots still attached, even better. That is a sign they were pulled recently, still alive.
The secret to this quiche lives in patience. You cook the leeks low and slow in good butter until they collapse into something silky and sweet, almost jammy. This takes longer than you think, thirty minutes or more, and you cannot rush it. High heat makes them bitter. Gentle heat makes them tender. Getting out of the way is the whole philosophy.
Gruyère brings its nutty depth to balance the leeks' sweetness. Find a wedge with some age to it, cave-ripened if you can. Grate it yourself. Pre-shredded cheese is coated in starch to prevent clumping, and that starch interferes with the custard's silkiness.
Every meal is a meaningful choice. A quiche made with care, with leeks from a farmer you trust and eggs from hens that lived well, tastes different. It carries meaning beyond nutrition. This is food that gathers people around a table.
Quantity
1 1/4 cups (160g)
Quantity
1/2 teaspoon
Quantity
8 tablespoons (1 stick/113g)
cut into small cubes
Quantity
3 to 4 tablespoons
Quantity
3 (about 1 1/2 pounds)
Quantity
3 tablespoons
Quantity
1/2 teaspoon
Quantity
to taste
freshly ground
Quantity
4
Quantity
1 1/2 cups
Quantity
1/4 teaspoon
freshly grated
Quantity
6 ounces (about 1 1/2 cups)
grated
Quantity
1 tablespoon
| Ingredient | Quantity |
|---|---|
| all-purpose flour | 1 1/4 cups (160g) |
| fine sea salt (for crust) | 1/2 teaspoon |
| cold unsalted butter (for crust)cut into small cubes | 8 tablespoons (1 stick/113g) |
| ice water | 3 to 4 tablespoons |
| large leeks | 3 (about 1 1/2 pounds) |
| unsalted butter (for leeks) | 3 tablespoons |
| fine sea salt (for leeks) | 1/2 teaspoon |
| black pepperfreshly ground | to taste |
| large eggs | 4 |
| heavy cream | 1 1/2 cups |
| nutmegfreshly grated | 1/4 teaspoon |
| aged Gruyèregrated | 6 ounces (about 1 1/2 cups) |
| fresh thyme leaves | 1 tablespoon |
Combine the flour and salt in a large bowl. Add the cold butter cubes and work them into the flour using your fingertips or a pastry cutter until the mixture resembles coarse meal with some pea-sized pieces remaining. These uneven butter bits create flaky layers. Drizzle in the ice water one tablespoon at a time, mixing gently with a fork until the dough just begins to clump together. It will look shaggy. That is right.
Turn the dough onto a lightly floured surface and press it together into a flat disk about one inch thick. Do not knead. Wrap tightly in plastic and refrigerate for at least one hour, or overnight. Cold rest relaxes the gluten and makes rolling easier.
Trim away the dark green tops and the root ends. Slice the leeks in half lengthwise, then cut crosswise into thin half-moons. Submerge them in a large bowl of cold water and swish vigorously. Leeks hide sand between their layers, and this grit will ruin your quiche. Lift the leeks from the water, letting the sand settle at the bottom, and transfer to a colander. Repeat if they were particularly dirty.
Melt the three tablespoons of butter in a wide skillet over medium-low heat. Add the leeks, salt, and several grinds of pepper. Cook slowly, stirring occasionally, until the leeks are completely soft and sweet, thirty to forty minutes. They should not brown. If they start to color, reduce the heat. The leeks will reduce to about one cup. Let them cool while you roll the crust.
On a lightly floured surface, roll the chilled dough into a circle about twelve inches across and an eighth inch thick. Transfer to a nine-inch tart pan with a removable bottom, pressing gently into the corners and up the sides. Trim any overhang to about half an inch above the rim, then fold it inward to reinforce the sides. Refrigerate for thirty minutes.
Heat your oven to 400°F. Line the chilled tart shell with parchment and fill with dried beans or pie weights. Bake for twenty minutes until the edges look set and dry. Remove the weights and parchment, then bake another eight to ten minutes until the bottom looks matte and lightly golden. Reduce oven temperature to 350°F.
Whisk together the eggs, cream, nutmeg, and a pinch of salt in a medium bowl until smooth. Do not overbeat. You want the custard unified, not frothy.
Scatter the cooled leeks evenly across the bottom of the warm tart shell. Distribute the grated Gruyère over the leeks. Pour the custard slowly over everything, letting it seep into the crevices. Sprinkle the thyme leaves across the surface. Bake at 350°F for thirty-five to forty-five minutes, until the custard is set around the edges but still has a gentle wobble in the center when you nudge the pan.
Let the quiche cool in the pan on a wire rack for at least twenty minutes before slicing. This rest firms the custard and makes clean slices possible. Serve warm or at room temperature. Quiche is patient food. It waits for you.
1 serving (about 165g)
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