Preheat oven to 375.
Cut squash top off, then cut in half lengthwise. Scoop out seeds. Drizzle with 2 tbsp olive oil and sprinkle with salt. Turn upside down on a baking sheet lined with parchment paper and bake for 30 minutes.
Meanwhile, add 1 tbsp olive oil and butter to soup pot. Once melted add diced onion. Cook for 10 minutes. Add celery and carrot and cook for 5 minutes more.
Add broth to pot and bring to a boil. Reduce heat and let simmer for 20 minutes until carrots are softened.
Remove squash from oven and let cool slightly. Scrape out the beautiful squash, add to the soup pot and mix to combine.
Let cool slightly. With a ladle, transfer to a blender in small batches. Blend until pureed.
Add maple syrup to soup and stir to combine.
Salt and pepper to taste.
Enjoy with a soft bread! Happy Fall!