In a large saute pan, heat the olive oil over medium heat. Add the sausage, and saute until cooked through, using your spatula to break it up into small pieces.
Add the mushrooms and saute until tender, about 4-5 minutes. Deglaze the pan with wine, and simmer until the liquid has been completely evaporated. Season with salt, pepper, and herbs, and reserve the mixture.
In a medium pot, melt the butter over medium heat. Add the onions and saute until tender, about 4-5 minutes. Add the garlic and saute until fragrant, 1 minute more.
Stir in the flour, and cook for a few minutes more. Gradually whisk in the milk – whisk constantly to be sure there are no lumps.
Cook the bechamel until its thick enough to coat the back of a spoon – season with salt, pepper, cayenne, and nutmeg. Remove form heat and set aside.
Begin layering the noodles in an individual loaf pan or a small casserole. Spread a layer of bechamel on top of the noodles, and top with a layer of the sausage-mushroom mixture.
Repeat until all the noodles and filling are used, finishing with a layer of bechamel on top. Top generously with grated cheese.
Bake the lasagna until the sauce is bubbly and the cheese is golden, about 20-30 minutes.
I always carry three kinds of hot sauce in my purse. I have a soft spot for making people their favorite dessert, especially if it's pie. My first cookbook, The Fearless Baker, is out on October 24, 2017.