Preheat oven to 400°F
Place empty dutch oven in oven to pre-warm.
Blend the vegetable broth, dates, tomato paste, dijon mustard, smoked paprika, onion powder and tamari in a blender.
Prepare cauliflower by peeling off the leaves and cutting the core so it is flat with the bottom of the cauliflower.
Place cauliflower into the pre-warmed dutch oven and pour blender mixture over the top, gently rubbing mixture into the grooves of the cauliflower.
Sprinkle the thyme rosemary and sage over entire surface of cauliflower.
Place lid on the dutch oven and bake for 45 minutes to an hour or until cauliflower is tender.
Remove dutch oven lid, raise the temperature to 450*F and bake for 5 more minutes or so to brown cauliflower slightly.