In a large soup pot, heat the olive oil over medium-high heat. Add onions and sauté for 3-5 minutes, until onions are translucent. Add minced garlic and sage and sauté for another minute until fragrant. Stir in the carrots, celery, butternut squash, and spices. Stir to fully coat the butternut squash. Add vegetable broth and bring to a boil. Reduce heat, cover, and simmer for 20 minutes or until vegetables are tender.