Lasagne with Wild Mushrooms, Leeks and Gorgonzola

Instructions

Bring a large pot of salted water to a boil over high heat. Add the lasagne noodles and cook until al dente, 8 to 12 minutes. While the pasta is cooking, fill a large bowl with cold water. When the pasta is done, drain the pasta and place in the bowl of water to cool. After 5 minutes, drain the pasta and place the pieces in a single layer on a baking sheet. Cover with plastic wrap and set aside.

In a small bowl, mix together the ricotta and Parmigiano, and season with salt and pepper. Set aside.

Heat 2 tablespoons of the olive oil in a skillet over medium-low heat. Add the leeks and cook, uncovered, stirring occasionally, until the leeks are very soft and light golden, about 30 minutes. Remove the leeks from the pan and reserve.

Heat the remaining 2 tablespoons olive oil in a large skillet. Add the mushrooms and cook until they are soft and the liquid has evaporated, 7 to 10 minutes. Add the garlic and stir for 1 minute. Add to the leeks and stir together.

Melt the butter in a saucepan over medium-high heat. Stir in the flour and cook, uncovered, stirring constantly, for 2 to 3 minutes. Add the milk and whisk constantly until it comes to a boil and thickens, 4 to 5 minutes. Add the Gorgonzola and stir until smooth. Season with salt, pepper, and nutmeg.

Preheat the oven to 375°F. Oil a 13 by 9-inch baking dish. Cover the bottom of the baking dish with a single layer of pasta. Cover the pasta with one-third of the ricotta mixture. Sprinkle one-third of the mushroom-leek mixture over the ricotta. Spread one-third of the cheese sauce over the vegetables. Repeat with the remaining 2 layers. Sprinkle the mozzarella evenly over the top layer. Bake on the top rack of the oven until the surface is golden and bubbling around the edges, 40 to 50 minutes. Remove from the oven and let stand 15 minutes before serving.