Carefully split the Spaghetti Squash in half from blossom to stem. [Here's a safe, easy method for doing that if you're not sure how.]
Clean out seed cavity, and sprinkle the inside of the squash halves with olive oil. Season with salt and pepper.
Place the cut side down on a Silpat mat (or parchment) lined baking sheet and roast for 25-35 minutes, or until fork tender.
Allow cooked squash to cool cut side down for at least 10 minutes. Turn over.
Use a fork to scrape out the insides and separate strands.