Autumn holiday recipe - vegetarian main course

ysabetwordsmith invited readers to share the contents of their (American) Thanksgiving table. When I posted what was served here, they said they would like the recipe for one of the items that was served. Here it is, adjusted to reflect my experiences in preparing a test recipe and making the final version.

The original recipe is "Molly's Pumpkin and Sage Lasagna" from The New Thanksgiving Table by Diane Morgan. When we did a test preparation, we found that we had much more pumpkin than would readily fill just two layers; there wasn't enough ricotta; the whole thing was dry; and the top noodles were Extra Crispy. So I doubled the ricotta and the white sauce to compensate. Adjustments are noted by [in practice].

I have also reorganized the recipe to reflect how I put the whole thing together. Starting with all the ingredients in their original state, it took me about 2 hours to assemble the pan. The recipe notes that that can be done the day before and the pan placed in the refrigerator -- which I did.

( The recipe... )