Extremely easy, vegetarian friendly (you can make it vegan if you want), and absolutely delicious.
Wash the dirt (and nasty chemicals if not organic) off of the squash, then slice into two halves longways. Scoop out the seeds. Cut the squash into 1-inch “cubes” and steam for about 20 minutes or so until done. The squash pieces should be soft, but not too mushy. Transfer to a bowl, add about a half tablespoon of butter, sprinkle in some brown sugar, and mix it all together.