Put butternut and kobucha squash on a tray lined with parchment paper or a silpat liner and roast for 30 minutes, or until tender all the way though.
In a large pot, add onion, carrots, and celery with water and spices. Heat on medium until onion begins to cook, stirring frequently.
Add all remaining ingredients (squashes) and enough water to just cover. Bring to a boil and simmer for 20 minutes, or until the carrots are cooked through.
Either using an immersion blender or a high-speed mixer, blend the soup until smooth. Serve hot. Keeps in the fridge 2-3 days.