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1
Preheat the oven to 425 degrees.
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2
Line a baking sheet with foil.
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3
Cut the squash into big chunks, brush the exposed flesh with 1 tablespoon of the olive oil and place on the baking sheet.
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4
Bake 45 minutes or until squash is tender enough to be pierced through to the skin with a paring knife.
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5
Remove from the heat and allow to cool until you can handle it, then cut away the skin and cut in thin slices.
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6
Turn the oven down to 350 degrees
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7
While the squash is in the oven, make the bechamel.
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8
Heat the remaining oil over medium heat in a heavy medium saucepan.
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9
Add the shallot or onion and cook, stirring, until it has softened, about 3 minutes.
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10
Stir in the flour and cook, stirring, for about 3 minutes, until the mixture is smooth and bubbling, but not browned.
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11
It should have the texture of wet sand.
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12
Whisk in the milk all at once and bring to a simmer, whisking all the while, until the mixture begins to thicken.
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13
Turn the heat to very low and simmer, stirring often with a whisk and scraping the bottom and edges of the pan with a rubber spatula, for 10 to 15 minutes, until the sauce is thick and has lost its raw flour taste.
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14
Season with salt, pepper and nutmeg.
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15
Strain while hot into a large measuring cup or a medium bowl and stir in 1/4 cup of the Parmesan and 1 tablespoon of the sage
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16
Preheat the oven to 350 degrees.
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17
Oil a rectangular baking dish.
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18
Spread a spoonful of bechamel over the bottom.
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19
Top with a layer of lasagna noodles.
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20
Spread a thin layer of the bechamel over the noodles.
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21
Top with half the squash.
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22
Season the squash with salt and pepper and sprinkle with Parmesan.
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23
Repeat the layers, ending with a layer of lasagna noodles topped with bechamel and Parmesan.
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24
Sprinkle the remaining sage over the top.
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25
Make sure the noodles are well coated with bechamel so they will soften during baking
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26
Cover the baking dish tightly with foil and place in the oven.
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27
Bake 40 minutes, until the noodles are tender and the mixture is bubbling.
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28
Uncover and, if you wish, bake another 5 to 10 minutes until the top begins to brown.
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29
Remove from the heat and allow to sit for 5 minutes before serving