Preheat the oven to 400°F (200°C)
Wash the spaghetti squash
Cut the squash in half lengthwise
Scoop out the seeds
Brush the cut sides with oil
Season with salt and pepper if desired
Place the halves cut-side down on a baking sheet
Bake for 35 to 45 minutes
Check for doneness by piercing the skin with a fork
Remove from the oven
Let cool for a few minutes
Scrape the flesh with a fork to create strands