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1
Bring a large pot of water to a boil.
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2
Meanwhile, heat the EVOO in a large skillet over medium-high heat.
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3
Brown the sausage and crumble to very small pieces.
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4
Then add the veal, brown and crumble.
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5
Add the sage, garlic, onions and some salt and pepper, and cook until tender.
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6
Separate the spinach with your fingertips and add to the skillet.
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7
Stir to heat through, then deglaze with the wine and remove from the heat.
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8
In a saucepot over medium heat, melt the butter, whisk in the flour and bring to a bubble.
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9
Whisk in the milk and season with salt, pepper and nutmeg to taste.
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10
Thicken the sauce to coat the back of a spoon.
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11
Taste to adjust the seasoning and remove a ladle of sauce to combine with the egg yolks to temper them.
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12
Add the egg yolks to the sauce and stir in half of the fontina cheese and Parmigiano-Reggiano.
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13
Reduce the heat to low, or cover to keep warm.
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14
Salt the water, and cook the pasta to a chewy al dente, 6 to 7 minutes.
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15
Then drain and cool.
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16
Fill the tubes or shells with the meat filling using small spoon.
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17
Cover the bottom of the baking dish with one-quarter of the sauce, then arrange the shells and cover with the remaining sauce, then top with the remaining cheese.
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18
Refrigerate or freeze for a make-ahead meal.
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19
Bake from room temperature at 375 degrees F until brown and bubbly, 30 to 40 minutes.