Pre-heat oven to 375F degrees.
Wash the butternut squash thoroughly in soapy water and scrub using a vegetable brush (this is important as we will be eating the skin!)
Cut the butternut squash in half (the long way) and clean the seeds out. Place it on a baking sheet. Sprinkle with oil, salt and pepper then place the garlic cloves and fresh parsley in the cavity for flavoring. Bake for 45 mins. Don't worry if the squash isn't soft and mushy, the blender will do the rest of the job.
Cut the squash in large chunks and place it in the blender, along with the roasted garlic and parsley. Add the parmesan cheese and Pulse for about 1 minute (if using a Vitamix) or until it has reached a pureed consistence.
Transfer to a bowl, sprinkle with more cheese and parsley and serve as a delicious and healthy side dish.