kosher salt, plus more for the noodles
lasagna noodles
salted butter
all-purpose flour
whole milk
Black pepper, to taste
grated parmesan cheese
Pinch of grated nutmeg
Pinch of cayenne pepper
pure pumpkin puree
16-ounce container whole-milk ricotta cheese
shredded mozzarella cheese (about 1 1/2 pounds)
large egg, beaten
chopped fresh sage, plus more for topping