Preheat the oven to 400°F (200°C)
Wash the butternut squash
Cut off both ends
Peel the skin with a vegetable peeler
Cut the squash in half lengthwise
Scoop out the seeds
Cut the squash into cubes or leave it in halves
Place on a baking sheet
Drizzle with oil
Add salt and any desired seasonings
Toss to coat evenly
Spread in a single layer
Bake for 25 to 35 minutes for cubes
Bake for 40 to 50 minutes for halves
Flip halfway through cooking
Check for tenderness with a fork
Remove from the oven
Serve warm