Heat oven to 400 degrees. Peel and half butternut squash the long way. Scoop out the seeds and drizzle flesh with olive oil and a little salt + pepper. Roast, skin side up, for about 45 minutes, until you can easily slide a sharp knife into it.
In the meantime, chop onions and garlic. Add onions to a pan on medium heat with a little olive oil, salt + pepper. Stir for 5 minutes until translucent.
Add in garlic and stir for another minute. Turn heat off and let sit.
Cook pasta using directions and strain. Run over with cold water to stop cooking process (if you’re still waiting for the other ingredients to cook).
When squash is done, scoop out the flesh and put into a blender with milk, onions, nutritional yeast, garlic, 1 tsp salt and some cracked black pepper. Blend until very creamy.
Pour pasta and sauce back into the frying pan and add grated cheese. Stir on low heat until combined and melted through.
Turn oven on broil. Combine breadcrumbs, chopped sage + thyme. Pour pasta into an oven-safe dish. Top with breadcrumbs. Broil for 5ish minutes, until golden on top.