Slice spaghetti squash into halves and scrape out seeds. Place in a baking dish, flesh side up, and drizzle with the olive oil. Sprinkle salt and pepper over top.
Bake for 40-45 minutes, until you can slide a knife easily into the squash. Let cool until you can handle it; run a fork across the squash to separate all of the strands. Scoop strands out and serve with a sauce or bake them into something delicious.