Use a knife to make small cuts all around the spaghetti squash; the larger the spaghetti squash the more cuts are needed. These perforations will allow steam and moisture to be released.
Place on a microwave-safe plate and microwave for 15 minutes.
Allow to cool for an additional 15 minutes. When the spaghetti squash is fully cooled, it should be soft and easy to slice through.
Cut spaghetti squash in half. Use a large spoon to scoop out seeds. Use a fork to shred the squash into spaghetti strands.
Over medium heat, add olive oil and garlic together and sauté for a couple minutes. Add shredded spaghetti squash, season with Italian seasoning, salt and pepper
Sauté everything together for about 3 to 4 minutes, and top with parmesan cheese.