Thaw the frozen butternut squash at room temperate. Drain the water that seeps out from the butternut squash, set aside.
Whisk the butter, honey, balsamic vinegar and salt until well combined. Toss the butternut squash with the honey balsamic mixture.
Transfer the butternut squash to a baking sheet lined with parchment paper, in a single layer. Roast for 12-15 minutes. Garnish with the parsley and serve immediately.
Notes
If you use fresh and raw butternut squash, roast it for about 40-45 minutes until they become tender and cooked.