Scatter squash chunks on one half of the sheet tray and toss with 1 Tbsp. olive oil. Rub the other half of the squash with 1 Tbsp. olive oil and lay cut side down on the other side of the tray.
Season with salt and roast until browned and tender, about 30 mins. When the half of squash is slightly cooled, scoop out, and puree in a food processor until smooth.