The secret to this ultra-silky quiche Lorraine? A little bit of sour cream:
1 1/2 sticks unsalted butter, cubed and chilled1 cup grated Gruyère cheese2 tablespoons chopped chives, plus more for garnishMake the dough In a medium bowl, whisk the 2 cups of flour with the salt and pepper. Using your fingertips, blend in the butter until it resembles small peas. Sprinkle the water on top and mix until the dough begins to come together. Turn the dough out onto a work surface and gently knead 2 or 3 times, just until it comes together.
Line the tart shell with aluminum foil and fill to the top with pie weights or dried beans. Bake for about 40 minutes, until the crust is set and lightly golden. Remove the foil and weights and bake the shell for about 12 minutes longer, until deep golden and crisp. Transfer to a rack to cool slightly, about 10 minutes. Reduce the oven temperature to 325°.