Preheat oven to 400°F
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
Place cut side down on a baking sheet
Roast for 35 to 45 minutes
Check for tenderness with a fork
Remove from oven
Let cool slightly
Scrape the flesh into strands with a fork