Bake
Preheat oven to 350°F.
Cut squash in half lengthwise and cut out seeds. Place in baking dish, cut side down. Bake uncovered for 50 minutes or until fork inserts easily through the skin. Flip over and fork out the strands. If the strands do not fork out easily, put back in the oven until they do.
Microwave
Cut squash in half lengthwise. Place in a glass or ceramic baking dish, cut side up. Cover with plastic wrap to steam it. Pierce the plastic wrap a few times. Microwave until the strands fork out easily. Time depends on size of your squash.