Start by heating a pan, add olive oil/butter and cinnamon stick.

Once the oil heats add sweet potatoes, apple and celery cubes. Mix this well.

Now add pumpkin spice and vegetable broth. Bring this to a boil. Then simmer on low heat till the sweet potatoes are thoroughly cooked.

Once done, let it rest for few minutes. Then transfer it to a food processor and turn it into a smooth puree.

Pour this into a serving bowl, garnish it with some walnuts and freshly grounded black pepper and serve warm.