this is the simplest of all the pumpkin recipes I've tried and it's delicious.
There are several places to find it, but I got it from "the big red kitchen"
http://www.bigredkitchen.com/2008/11/two-ingredients-pumpkin-cake-with-apple.html
The only 2 ingredient are a box of cake mix and can of pumpkin. (not pumpkin pie mix)
I made muffins, but the options are endless.