In a large soup pot, heat about a tablespoon of oil over medium heat.Add your onion and and cook until the onion is soft and translucent, about 8 minutes.Add the sweet potato and stir so it is coated with some of the oil. Allow to cook about 5 minutes. Add the cauliflower, garlic, stock, parsley, thyme, cayenne, salt and bring to a boil.Lower heat and simmer about 20-25 minutes.Add the kale and cook until it is wilted, about 5 more minutes.Stir in the dash of cinnamon and serve.