Instructions: Roll the pasta out to the thinnest setting on a pasta rolling machine and cut the resultant sheet into ribbons 1/4-inch thick. Place on a sheet tray dusted with semolina and cover with a clean, damp dish towel until ready to cook.

Bring 6 quarts of water to a boil and add 2 tablespoons salt.

In a 12- to 14-inch saute pan, heat the olive oil over high heat until smoking. Add the mushrooms and saute over high heat until browned, about 2 to 3 minutes per batch. The mushrooms should not release their juices. Remove the mushrooms and add the onion, leeks, garlic, thyme leaves and salt and pepper to taste. Cook for 5 more minutes, then add the tomato sauce. Bring to a boil, then reduce to a simmer and add the mushrooms. Cook 10 more minutes and set aside.

Cook the pasta in the boiling water for 1 minute. Drain, reserving the pasta water, and add the pasta to the sauce. Toss over high heat 1 minute to coat, adding a splash of pasta water if necessary to keep the sauce from getting too "tight." Divide among six warmed pasta bowls and top with grated Parmigiano-Reggiano.

This recipe yields 6 servings.

Description: "(Tagliatelle Con Sugo Di Funghi E Porri)"

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