To cook the squash: Preheat oven to 400F and line a baking sheet with parchment paper. Slice the stem off the squash (optional) and slice the squash in half lengthwise. Scoop out the seeds with a spoon. Brush a bit of oil on the squash and sprinkle with a pinch of salt. Place squash on the baking sheet, cut side up, and roast for 35-50 minutes, until fork tender and golden brown on the bottom. Allow to cool.