1. Heat oven to 425 degrees. 2. Line a large rimmed metal baking sheet with parchment paper. 3. Place the squash on the parchment. 4. Toss the squash in the oil. 5. Once the squash is evenly coated in oil, toss in the pumpkin pie spice and season with salt. 6. Spread the squash out evenly. 7. Roast for 10 minutes, then flip the squash. 8. Roast another 10 minutes, or until very tender. 9. Fold in the toasted pecans. Serve warm, room temperature, or cold.