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Celery Root and Mushroom Lasagna
© John Kernick

Celery Root and Mushroom Lasagna

  • ACTIVE: 1 HR 30 MIN
  • TOTAL TIME: 3 HRS
  • SERVINGS: 10
  • MAKE-AHEAD

"In Marche, we only make lasagna for special occasions like Christmas," Fabio Trabocchi says. For this streamlined version of his luxe lasagna in bianco (white lasagna), he layers flat noodles with a supremely rich sauce, along with a root-vegetable ragù, fresh mozzarella and whole basil leaves.

  1. 1 cup dried porcini mushrooms
  2. 2 cups boiling water
  3. 4 tablespoons unsalted butter
  4. 1/4 cup extra-virgin olive oil
  5. 3/4 pound white mushrooms, thinly sliced (4 cups)
  6. Salt and freshly ground white pepper
  7. 1/4 pound thickly sliced prosciutto di Parma, cut into 1/4-inch dice
  8. 2 medium shallots, finely chopped
  9. 1 fresh bay leaf
  10. 2 rosemary sprigs
  11. 2 sage sprigs
  12. 2 thyme sprigs
  13. 1 pound celery root, peeled and finely diced (1 1/2 cups)
  14. 3 medium leeks, white and tender green parts only, finely chopped (3 cups)
  15. 1/2 cup dry Marsala
  16. 4 cups chicken stock or low-sodium broth
  17. 2 1/2 cups heavy cream
  18. 1 3/4 cups freshly grated Parmigiano-Reggiano cheese
  19. 2 large eggs
  20. 1 1/2 pounds lasagna noodles
  21. 1 1/2 pounds fresh mozzarella, thinly sliced
  22. 1 cup basil leaves
  1. In a small, heatproof bowl, soak the porcini in the boiling hot water until softened, about 15 minutes. Drain and coarsely chop the porcini.
  2. In a large saucepan, melt 2 tablespoons of the butter in 2 tablespoons of the olive oil. Add the white mushrooms and the porcini, season with salt and white pepper and cook over moderately high heat, stirring occasionally, until browned, about 10 minutes. Transfer the mushrooms to a bowl.
  3. Add the remaining 2 tablespoons each of butter and olive oil to the saucepan. Add the prosciutto and shallots and cook over moderately low heat, stirring occasionally, until softened, about 6 minutes. Using kitchen string, tie the bay leaf, rosemary, sage and thyme sprigs into a bundle. Add the herb bundle and the celery root to the saucepan and cook, stirring occasionally, until the celery root is crisp-tender, about 6 minutes. Add the leeks and cook until the celery root is tender, 5 minutes longer.
  4. Return the mushrooms to the saucepan and stir over moderate heat until hot, 2 minutes. Add the Marsala and cook until evaporated, 5 minutes. Pour in 2 cups of the chicken stock and simmer over moderate heat for 10 minutes. Add 1/2 cup of the cream; simmer for 3 minutes longer, until the mixture has reduced to 5 cups. Season the ragù with salt and white pepper.
  5. In another large saucepan, combine the remaining 2 cups each of cream and chicken stock and bring to a boil. Simmer over moderate heat until reduced to 3 cups, about 10 minutes. Off the heat, whisk in 1 1/2 cups of the Parmigiano-Reggiano cheese. Whisk in the eggs. Transfer the sauce to a blender and puree until smooth. Season with salt and white pepper. Set 1/2 cup of the sauce aside.
  6. Bring a very large pot of salted water to a boil and fill a large bowl with ice water. Cook the lasagna noodles until just barely al dente; drain and transfer to the ice water to cool. Drain the noodles and pat dry.
  7. Preheat the oven to 350°. Butter a 9-by-13-inch baking dish. Line the bottom with a single layer of noodles, overlapping them slightly; reserve the best noodles for the top layer. Spread one-fifth of the vegetable ragù on top, followed by one-fifth each of the sauce, mozzarella and basil. Repeat to make four more layers, ending with a layer of noodles (you won't use all the noodles). Top with the reserved 1/2 cup of sauce and sprinkle with the remaining 1/4 cup of Parmigiano-Reggiano cheese.
  8. Bake the lasagna until bubbling and golden, about 1 hour. Let the lasagna rest for 20 minutes before cutting into squares and serving.
Make Ahead The assembled lasagna can be refrigerated overnight. Bring to room temperature before baking.

Suggested Pairing

This white lasagna needs a red with good acidity to cut through the creamy, cheesy richness. Montepulciano d'Abruzzo, from central Italy, has that acidity, along with ripe berry flavors.

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