Gather ingredients and preheat oven to 425℉/ 218℃. Line a baking sheet with parchment paper and set aside
Peel and cube butternut squash (see tips above) and quarter onion. Place these on the baking sheet
Season squash and onion with 1 ½ TBS olive oil, 1 tsp salt and ½ tsp pepper
Roast the squash and onions for 30-40 minutes or until soft and can be pierced with a fork
Peel and dice the granny smith apple and dice the celery stalk
Sauté the granny smith apple and celery stalk in an 8-quart pot until soft with 1 ½ TBS of remaining olive oil and 1 tsp each of salt, cinnamon, ground ginger, coriander, ground sage, and cayenne
To create a herb bouquet, take a cheesecloth and wrap it around the sage, thyme, and bay leaves. Tie it off with twine (see the picture above for more details).
Add the bouquet of herbs, 3 cups of vegetable stock, roasted butternut squash, and onions to the pot. Simmer for 45 minutes
Use an immersion blender or scoop the contents of the pot into the blender in batches. Blend the ingredients together. If the soup is too thick, add an additional cup of vegetable stock and blend again.
Add butter and remaining salt
Serve and enjoy your herbed butternut squash soup!