Combine the squash, stock, and salt and pepper to taste in a saucepan. Bring to a boil, turn the heat to medium-low, and cook, covered, until the squash is very tender, 15 to 30 minutes (depending on the size of your chunks).
Carefully puree the squash in a blender with enough of the stock to allow the machine to do its work. The mixture should be very smooth. Com