Swiss Onion Tart

This tart, which comes from baker Nick Malgieri, uses a salty, smoky ham known as speck, a traditional ingredient in this tart; bacon is a good substitute.

Photo by Lisa M.
Adapted from saveur.com

PREP TIME

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minutes

TOTAL TIME

--

minutes

SERVINGS

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servings

PREP TIME

--

minutes

TOTAL TIME

--

minutes

SERVINGS

--

servings

Adapted from saveur.com

Ingredients

  • FOR THE CRUST:

  • 1 1/2

    cups flour

  • 1/2

    tsp. baking powder

  • 1/4

    tsp. kosher salt

  • 8

    tbsp. unsalted butter, chilled and cubed

  • FOR THE FILLING:

  • 3

    oz. speck or bacon, finely chopped

  • 3

    tbsp. unsalted butter

  • 1 1/2

    lbs. white onions (about 3), finely chopped

  • Kosher salt to taste

  • 1/2

    cup milk

  • 1/2

    cup heavy cream

  • 3

    eggs

  • 3

    oz. grated Gruyère or Swiss cheese

  • Freshly ground black pepper and freshly grated nutmeg

Directions

1. Make the crust: Pulse flour, baking powder, and salt in a food processor to combine. Add butter and pulse until pea-size pieces form. Add ¼ cup ice-cold water; pulse briefly. Transfer dough to a floured work surface; form into a disk. Wrap in plastic wrap; chill for 1 hour. 2. Heat oven to 425°. Transfer dough to a floured work surface. Roll dough into a 13" circle; transfer to an 11" fluted tart pan with a removable bottom, pressing into bottom and sides. Trim excess dough; chill for 30 minutes. Prick bottom of dough with a fork; cover bottom with a sheet of parchment paper; fill with dried beans. Bake until crust is set, about 20 minutes. Remove paper and beans; bake until crust is light brown, about 15 minutes. Let cool. 3. Meanwhile, make filling: Cook bacon in a 4-qt. saucepan over medium heat until crisp, 7–8 minutes. Using a slotted spoon, transfer bacon to a plate. Discard bacon fat; add butter. Add onions and season with salt; reduce heat to low, cover, and cook, stirring occasionally, until soft, about 10 minutes. Uncover; cook until lightly browned, 10 minutes. Let cool. 4. Whisk milk, cream, and eggs in a bowl; add reserved bacon and onions along with cheese. Season with salt, pepper, and nutmeg. Pour filling into tart; place on a baking sheet. Place tart in oven and reduce heat to 400°. Bake until filling is golden brown and set, 45–50 minutes. Transfer tart to a wire rack to let cool completely before slicing and serving.

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