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1
1. Preheat oven to 400. Add cubed eggplant (1 inch cubes) to a bowl and toss with 2 T. olive oil. Line a sheet pan with aluminum foil and spread eggplant on it in one even layer. Roast for about 30 minutes, turning eggplant halfway to ensure even browning. Remove from oven and allow to cool. Reduce oven temperature to 350.
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2
In a skillet heat 2 T. olive oil and saute prosciutto until crispy. Then add onion and rosemary, stir until onion is tender and translucent. Be sure to watch the skillet and stir the mixture so nothing burns! Once onion is tender turn off the heat and set the pan aside.
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3
For the Sauce: Boil milk and broth over medium heat. Once it is boiling turn off heat and set aside. Working quickly, in a separate pan melt 8 T. butter. Whisk in the flour and stir to make a roux. Once flour is incorporated, whisk in the hot milk and broth mixture, bring it to a boil. Reduce heat to simmer and stir for 5 minutes to let the sauce thicken. Remove from heat and quickly stir in the cheeses and nutmeg. Add salt and pepper to taste.
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4
Grease a 13x9 baking dish and spread 1 cup of sauce on the bottom. Arrange the lasagna noodles snugly over the layer of sauce, it is ok if they are slightly overlapping. On top of the noodles layer another cup of sauce. Then top it with half of the roasted eggplant, and half of the prosciutto. Top with a second layer of noodles and repeat layers.
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5
After the second layer is complete, top with a third layer of lasagna noodles. Pour any remaining sauce over the top and sprinkle 1/2 c. parmesan cheese over the sauce. Bake for about 45-50 minutes, or until golden and bubbly. This can be prepared ahead of time and baked later in the day.
