Add 3/4 tsp. of ground cinnamon for a tasty flavor kick. Recipe from Real Baby Food by Jenna Helwig.
Preheat the oven to 425°F. Wash and trim the squash, then halve it lengthwise and scrape out the seeds with a spoon.
Line a rimmed baking sheet with parchment paper. Place the squash halves cut-side down on the baking sheet. Roast until completely tender when pierced with a fork, about 40 minutes. Let cool.
When the squash is cool enough to handle, spoon the flesh into a food processor. Purée to the desired consistency (make it thinner for a newbie diner, a bit thicker and chunkier if you have a more seasoned eater), adding water if needed.