Preheat your oven to 400°F (200°C).

Peel the butternut squash and cut it in half lengthwise, scoop out the seeds, and dice into 1-inch cubes.

In a mixing bowl, combine melted butter, brown sugar, and salt. Whisk until smooth, then coat the diced squash.

Spread the coated squash on a baking sheet lined with parchment paper and roast for 40 minutes, flipping halfway through.

Remove from the oven, let cool briefly, and serve warm.