Make butternut squash soup on a sheet pan
Heat the oven to 350 degrees. Line a rimmed baking sheet with a nonstick silicone baking mat or parchment paper. Place the squash, onion, carrot, celery and garlic on the prepared sheet pan in a single layer. Spray the vegetables with nonstick cooking spray. Transfer to the oven and cook until the squash is tender, about 1 hour.