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1
Preheat the oven to 350 degrees F. Butter a 9- by 13- by 1-inch glass or ceramic baking dish.
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2
Set aside.
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3
For the vegetables: In a large nonstick skillet, heat the oil over high heat.
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4
Add the mushrooms, onions, salt and pepper.
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5
Cook, stirring frequently, until the onions are soft and any liquid from the mushrooms has evaporated, about 20 minutes.
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6
For the sauce: In a heavy-bottomed 5-quart saucepan, bring the cream, milk and flour to a simmer over medium heat, whisking constantly for 3 minutes.
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7
Reduce the heat to low.
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8
Add the Pecorino and the mozzarella.
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9
Whisk until the cheeses have melted and the sauce is smooth.
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10
Remove the pan from the heat and stir in the spinach, basil, garlic, salt and pepper.
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11
Add the mushroom mixture to the sauce and stir to combine.
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12
Set aside to cool slightly.
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13
Cut the Fresh Pasta dough in quarters and press flat.
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14
Run each piece of pasta dough several times through a pasta-rolling machine adjusting the setting each time until the pasta is about 1/16-inch thick.
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15
Cut the pasta into six 12- by 4-inch rectangles (reserve any pasta trimmings for another use).
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16
The pasta dough can also be rolled out by hand.
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17
Cut the chilled dough into quarters and using a rolling pin, roll out the dough until 1/8 to 1/16-inch thick.
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18
Spread 1 cup of the sauce over the bottom of the prepared baking dish.
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19
Arrange 2 sheets of pasta on top in a single layer.
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20
Spread 2 cups of the sauce over the pasta sheets.
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21
Repeat the layers with the remaining pasta sheets and sauce, ending with the sauce.
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22
Sprinkle with mozzarella.
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23
Drizzle with olive oil and bake until the filling is bubbling and the top is golden, 30 to 35 minutes.
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24
Cool for 20 minutes.
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25
Cut into squares and serve.
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26
Place the cake flour, all-purpose flour, egg yolks and salt in a food processor.
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27
Pulse to combine.
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28
With the machine running, gradually add the oil then 1/3 to 1/2 cup water until the mixture forms a dough (the dough should stick together if pinched between your fingers).
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29
If necessary, add additional water, 1 teaspoon at a time if the dough is too dry.
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30
Place the dough on a lightly floured surface.
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31
Gather the dough into a ball and knead until the dough is smooth, 5 to 8 minutes.
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32
Cover with plastic wrap and refrigerate for 30 minutes.