1. Preheat oven to 400.
2. In a large bowl, combine oil and spices.
3. Add florets, and toss until evenly coated.
4. Roast for 25 minutes, stirring halfway through.
5. In a saucepan, combine roasted cauliflower, chicken broth, Worcestershire sauce, and tamari. Bring to a boil, reduce heat to low, and simmer for 30 minutes.
6. Remove from heat, and puree in a blender or food processor or with an immersion blender.