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Delights of Dijon — Vichyssoise Galette with White Wine Mustard

Delights of Dijon — Vichyssoise Galette with White Wine Mustard

PARTNER POST — Discover the unique flavors of the Dijon region with Maille.
A potato and leek galette inspired by the comforting French soup, and livened with a white wine Dijon and fresh thyme.
By Samantha Ferraro


I have to admit I had a difficult time trying to name this recipe. Do I keep it to the point and call it “potato and leek tart” or do I make it fancy and use hard to pronounce words.

Vichysoisse galette. It sounds awesome. I imagine myself enunciating each syllable in my made up French accent. Drinking a glass of Rosé and wishing I was in Epernay for just one more moment. But alas, this gallete will have to suffice and bring me back to flavor memory with it’s simple, clean and direct flavors.

Vichyssoise was one of the first Julia Child recipes I ever made. I fell in love with the simple flavors of earthy yet delicate leeks and simple potatoes in a soup. Turning those ingredients into a tart was a no brainer. The starchy potatoes are sliced incredibly thin to achieve texture and also not have to pre-boil them and the leeks would be sautéed in butter, because, we are dreaming of France, aren’t we? Oui! oui!


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To up the flavor notches just a bit more, I dressed this elegant vichyssoise galette in tangy Maille white wine Dijon as both a mustard vinaigrette and a mustard bechamel. The mustard bechamel acts as the glue between the pastry and sliced potatoes and a quick Dijon vinaigrette lightly dresses the sliced potatoes before they are layered into the galette. As everything bakes together, the mustard intensifies just a bit making it the perfect accompaniment for leeks and potatoes.

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Delights of Dijon — Vichyssoise Galette with White Wine Mustard

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  • Author: Samantha Ferraro
  • Yield: 1 large galette, or 2 medium galettes 1x


A potato and leek galette inspired by the comforting French soup, and livened with a white wine Dijon and fresh thyme.




  • 1 1/4 c flour, sifted
  • 1/4 teaspoon salt
  • 8 Tb (1 stick) cold butter, cut into pieces
  • 1/4 cup Greek yogurt
  • 2 tsp fresh lemon juice
  • 1/4 cup ice water


  • 23 small Yukon potatoes, washed and thinly sliced
  • 1 large leek, washed and chopped
  • 2 Tb butter
  • Salt and pepper, to taste

Dijon Bechamel

  • 2 Tb butter
  • 2 Tb flour
  • 2 tsp Maille white wine dijon
  • 1 1/4 cup milk, heated
  • Salt and pepper, to taste
  • Pinch of paprika

Dijon Vinaigrette

  • 1/3 cup olive oil
  • 1 Tb honey
  • 1 Tb Dijon
  • 12 Tb lemon juice
  • Few sprigs of fresh thyme, leaves removed
  • Salt and pepper, to taste


  • 1 egg + water for egg wash
  • Fresh thyme leaves
  • Sea salt


  1. First make the dough, Sift together flour and salt in bowl and add to clean food processor with a dough attachment. Add small cubes of butter and blend together in food processor until it looks like small peas.
  2. In another small bowl, whisk together the Greek yogurt, lemon juice and water and add this to flour mixture. Blend together and test by squeezing a small piece of dough with your hands. If it sticks, it’s ready.
  3. Using very floured hands, form dough into a disk, wrap in plastic wrap and allow to rest in the fridge for 30 minutes.
  4. Next, make the vinaigrette. In a bowl, whisk together all the ingredients and taste for seasoning. Add sliced potatoes to the vinaigrette and toss gently to combine so all the potatoes are coated in the dressing. Set aside.
  5. To make the leeks, in a large skillet add the butter and leeks and cook leeks on medium heat until just about wilted. Season with salt and pepper. The leeks should still have their green color and not be overcooked. Set aside.
  6. Then make the bechamel. In a small pot, whisk together the butter and flour until there is no raw flour left. Add the mustard, paprika, salt and pepper and whisk to combine. Then slowly stir in the heated milk and continue stirring on low-medium heat until the milk thickens and mixture coats the back of a spoon, about 2-3 minutes. When ready, taste for seasoning and set aside.
  7. When dough is ready, roll out on a lightly floured surface to about 12 inches in diameter or make 2 smaller ones (like I did this time).
  8. Once dough is rolled out, transfer it to a non-stick baking sheet before filling. Spread mustard bechamel on dough leaving a 1 in border around, then layer with sauteed leeks and sliced potatoes.
  9. Fold the border over, creating a pattern if you wish. Brush egg wash around the crust and sprinkle with sea salt.
  10. Bake galette at 400 degrees F for 20 minutes until the crust is golden brown and potatoes cooked.


After slicing potatoes, soak them in cold water while you’re preparing the rest of the dish, which will help potatoes get more crispy. Then pat try with paper towels before dressing in vinaigrette.

If you see the crust is getting dark to quickly, cover tart with foil and continue baking.

  • Category: Appetizer, Baking
  • Cuisine: French Inspired


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