Preheat the oven to 400°F (200°C)
Wash the butternut squash
Cut off the stem and bottom
Peel the squash
Slice the squash in half lengthwise
Scoop out the seeds
Cut the squash into cubes or leave halves whole
Toss with oil, salt, and any desired seasonings
Spread on a baking sheet in a single layer
Bake cubes for 25 to 35 minutes
Bake halves for 40 to 50 minutes
Flip pieces halfway through baking
Bake until tender and lightly browned
Remove from the oven and serve