To cook a spaghetti squash:-

Slice spaghetti squash in half lengthwise. Scoop out the seeds with a spoon and clean as you would a pumpkin. Now you have 2 options ...

1.) Place, cut side down, in a baking dish. Add enough water to come 1/2-inch up the sides of the baking dish and cover with aluminum foil. Bake for 45 minutes, until the squash is easily pierced with a paring knife. Turn squash over and cover with foil again and continue to cook another 15 minutes, until the squash is very tender
OR

2.)Completely submerge 1 half at a time, in a large pot of boiling water and cook for about 20 minutes until the inside is just tender to a fork and pulls apart in strands. (Cook's Note: It is better to undercook if you're not sure.) Remove, drain and cool with cold water or ice bath to stop the cooking.

By Ali

I make mine in a crock pot. I pierce it all over, place in pot with 2 cups of water. Cook on low for 8 hours. Then cut in half and scoop out the middle.

By Michellejo