Place all the ingredients except for the coconut milk in a slow cooker.
3 lbs. sweet potatoes, 1 onion, 2 stalks of celery, 2 medium carrots, 1 tbsp. garlic, 5 cups chicken or vegetable stock
Season everything to taste with sea salt and freshly ground black pepper.
Sea salt and freshly ground black pepper
Cover and cook on low for 6h or on high for 4 h.
Puree everything until smooth using a blender or an immersion blender.
Add the coconut milk, give everything a good stir, and cook for another 30 minutes.
1 cup coconut milk
Adjust the seasoning and serve warm.