Preheat your oven to 350. Pierce the squash several times at the top. Line a baking dish with tinfoil, and then bake the squash until very soft (this can take as long as 1-2 hours, so put it in the oven and then do something else while you're waiting).
When the squash is done, remove from the oven and split open. Wait until it is cool enough to handle, then remove the seeds. Scoop all of the flesh from the squash into a food processor or blender, and blend till smooth.
Add the walnuts and the vegan parmesan and grind again. Then add your spices (black pepper, red pepper, nutmeg, basil, salt). The sauce should be very stiff.
This is where you get to decide what to do with the sauce. You can leave it thick and serve it as a dip with chips (pita?), or use it as a sandwich spread. We used it as the filling for ravioli. Or you can add as much veggie broth as you want, and make it into a pasta sauce. Enjoy!