To bake spaghetti squash, follow these steps:

1. Preheat the oven to 400°F (204°C).
2. Carefully cut the spaghetti squash in half lengthwise using a sharp knife. Remove the seeds and stringy pulp with a spoon.
3. Drizzle the inside of each half with olive oil and sprinkle with salt and pepper to taste.
4. Place the squash halves cut-side down on a baking sheet lined with parchment paper or foil.
5. Bake for about 40 to 60 minutes, depending on the size of the squash, until the flesh is tender and can be pierced easily with a fork.
6. Remove from the oven and let cool slightly.
7. Use a fork to scrape the flesh, which will come out in spaghetti-like strands, and serve.

This method yields tender, flavorful spaghetti squash with a nice texture that's neither mushy nor too firm. It can be enjoyed as a side dish or used as a base for various recipes.