Then I added whole milk and brought to a boil, and seasoned with salt, pepper, and nutmeg. I used about 1/3 cup each of butter and flour, and about 4 cups of milk. The sauce should be thinner than you might think, since the noodles soak up liquid.
Can I just say again how awesome those no boil lasagna noodles are? I never used to make lasagna until someone told me how well these work- now lasagna is a feasible everyday meal. So anyway, the bechamel (that's the milk sauce) gets layered with the Bolognese and the noodles.
Sprinkle some Parmesan on the top, cover with foil, and bake for 45 minutes at 350'. Then remove the foil and bake another 15 minutes or so.