Tagliatelle with Porcino Mushrooms

Cut away the tips of the mushroom stems; if using shiitake mushrooms, discard the entire stem. Thinly slice the mushrooms lengthwise.

In a large, heavy-bottomed fry pan over medium heat, warm the olive oil. Add the garlic and sauté until golden and fragrant, about 2 minutes. Remove and discard the garlic. Add the mushrooms and sauté, stirring with a wooden spoon, until they begin to soften, 3 to 4 minutes. (They might stick to the pan for a moment before beginning to release their juices, but it is not necessary to add more oil.) Increase the heat to high, add the wine and thyme and cook, stirring constantly, until the alcohol from the wine has evaporated, about 3 minutes. Reduce the heat to low, season with salt and pepper and continue to cook, stirring often, until the mushrooms are cooked through and all the liquid has evaporated, about 15 minutes more.

Meanwhile, bring a large pot three-fourths full of water to a boil over high heat. Salt the boiling water, add the pasta and cook until al dente, about 8 minutes. Drain, reserving about 1 cup of the cooking water.

When the mushrooms are ready, remove from the heat and stir in the butter. Add the pasta and toss, adding a bit of the reserved cooking water if the pasta seems too dry. Serve immediately and pass the cheese at the table. Serves 4 to 6.