Preheat the oven to 350 degrees F.
Very Very Carefully, cut the squash in half lengthwise......Cutting this in half is the hardest part because the skin of the squash is super hard.It may be best when buying the squash to ask a produce department employee to cut it in half lengthwise for you.
Using a spoon, scoop out and discard the pulp and seeds.
On a microwave-safe plate, place one of the halves of squash and lay a wet paper towel over it. Cook the squash covered with the paper towel in the microwave until tender (about 12 minutes; time may vary depending on the microwave).
When it’s done cooking, with the paper towel still covering the squash, set it aside for about 5 minutes so it will steam a bit longer.
Using a fork, gently pull out the strands from the inner sides and bottom of the squash (leave the strands inside of the squash).
After all of the strands are pulled out from the inner sides and bottom of the squash, add butter (the squash should still be warm).
Mix the butter in with the squash so it will melt. Set aside.