the only way i've ever eaten butternut squash is mashed with brown sugar. you cut it up into small squares (not the outside 'rind' or whatever it's called, it's pretty hard and tasteless), boil until soft, drain. transfer into a casserole dish, mash, mix in some margarine and brown sugar, bake (not sure the time or temp sorry) covered. near the end top with sliced almonds and continue to bake uncovered until almonds are toasted. you can leave the almonds out if you want, they're really just a garnish and to give some crunch but not necessary.
you can even buy frozen precooked butternut squash in teeny cubes. you just heat on the stove in a bit of water, drain and mash with a fork, stir in margarine and brown sugar, and voila, quicky no-mess version. not as tasty but makes a nice easy side dish in a pinch.
I'm singin' here to get rid of fear
Hope it disappears right here with the rain
But I know life is pain, not like a fairytale
Meaningless to pray, so just goin' on my way