Squash is awesome. You can do almost anything with it - soup, chili, bake it, side veg, mash it, I made it into hummus, deep fry it, add brown sugar so the kids love it, make it salty so everyone loves it...It's versatile, and reasonably cheap most of the year. It's also very easy to grow if you have space.
Butternut squash is easiest to use because it has a sweet, mild flavour and can be anything from stand alone soup in either chunky or creamy form, or it can be mixed into other ingredients to make anything. With it I've made hummus, mashed potatoes, filling for ravioli, and various other things.
This post brought to you by the squash growers of North America.