In a large pot, add cauliflower, chicken broth (or do what I do and add water and spoonful of "Better Than Boullion"), and the onion. Bring to a boil over medium-high, turn to medium and let simmer until the cauliflower is soft.

Now puree it either with an immersion blender or in a food processor.

Add the rest of the ingredients, simmer for at least twenty minutes.