Preheat oven to 350 degrees, line a baking sheet with parchment paper and spray with cooking spray. Cut the squash vertically into halves and remove the inner membranes and seeds with a spoon.
Place the squash on the prepared baking sheet and sprinkle the inside with salt. Cover with foil and bake for 40 minutes.
After 40 minutes, remove the squash from the oven and remove foil. Stir together the melted butter and brown sugar in a small bowl. Spoon the butter/sugar over the squash and spread evenly with the back of the spoon.
Return the pan to the oven, uncovered, for an additional 20–25 minutes until the tops are nicely glazed and the squash is tender.
For a bit more browning, broil them for 5 minutes.
Remove from the oven and spoon any glaze from the pan back over the top of the squash. Transfer the squash to a serving dish and sprinkle with additional salt or brown sugar if desired. Enjoy!
Notes
Roasted acorn squash makes a delicious side for roasted turkey or chicken.