Preheat oven to 350F. Cut squash lenghtwise and scoop out seeds. In a baking dish, toss in the garlic (whole), drizzle the squash with olive oil, sprinkle with salt and pepper and bake for 30-40 minutes, until tender.
In a food processor, add finished garlic, scoop out the squash from the skin and discard the skin. Add cream, nutmeg, and salt and pepper to taste. Mix until smooth, adding water/broth as needed to reach desired consistency.
Toss sauce with pasta of choice and serve immediately. Great with a sprinkle of parmesan cheese!