"Both the tart shell and filling for this luscious quiche can be prepped ahead, making it a great dish for brunch entertaining...."
INGREDIENTS
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1/2 cup (1 stick) chilled unsalted butter, cut into cubes
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1/8 teaspoon kosher salt
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1 1/4 cups all-purpose flour, plus more for surface
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1 large egg yolk
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5 ounces baby spinach (about 4 packed cups)
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2 tablespoons unsalted butter
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1 medium onion, thinly sliced
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1/2 cup frozen artichoke hearts, thawed, coarsely chopped
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1 teaspoon kosher salt
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1/2 teaspoon freshly ground black pepper
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4 large eggs
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2/3 cup heavy cream
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2/3 cup whole milk
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A 9-9 1/2-inch round fluted tart pan (1 inch deep) with removable bottom; pie weights or raw rice