So, here's what I did. I bought four butternut squash, washed, cut them in quarters, seeded them, put them in baking dishes, and baked them on 350 until they were soft (I really should time these. . . sorry). Note: I didn't think about putting foil over the top, but I will next time because they tops were a little tough. Then I pureed the squash and spread it out on my fruit leather sheets on my dehydrating trays.
I dehydrated them for a LONG time. I wanted to make sure they were really dry. They were in there for over 24 hours--probably close to 30 hours. Sorry I am so exact!! Ha ha!