Heat the olive oil and minced garlic in a large pot over medium heat.
Cook for a couple of minutes until the garlic becomes lightly browned.
Add the chopped carrots, celery, and onion. Stir and cook for about 10 minutes, or until the vegetables begin to soften.
Mix in the paprika, red pepper flakes, and ginger.
Add the chopped sweet potatoes and vegetable broth.
Bring the soup to a boil over medium-high heat, then reduce to low and simmer with the lid on for 15–20 minutes.
Once the sweet potatoes are soft and falling apart with a fork, blend the soup until smooth using an emulsifier or blender.
Return the soup to the pot if needed, then stir in the cinnamon, brown sugar, and pepper to taste.