To build the Lasagna: In the bottom of a 9×13 baking dish, ladle an even layer of Béchamel Sauce. Build the layers starting with Noodles, Sauce, Pumpkin, Mozzarella and Sauce. Continue with another Noodle layer then more Sauce, Pumpkin, Sauce, and Mozzarella. Repeat until all ingredients are used ending with a layer that is a Noodle layer, Béchamel, Pumpkin, more Béchamel, Mozzarella and Pecorino.