Cut the butternut squash in half lengthwise and scoop out the seeds. Place the halves cut side up on a baking sheet and drizzle with a little olive oil.
Roast for 35 to 45 minutes, or until the squash is very tender.
Let the squash cool slightly, then scoop the flesh out of the skin.
Add the roasted squash flesh, chickpeas, tahini, olive oil, lemon juice, garlic, salt, and cumin to a food processor.
Blend until smooth and creamy, stopping to scrape down the sides as needed.
If the hummus is too thick, add a small splash of water or a little more olive oil and blend again until it reaches your preferred consistency.