In a large pot, bring chicken broth to boil. Add onion, potatoes, and cauliflower. Cover and reduce heat but keep broth boiling. Boil for 20 to 25 minutes until potatoes and cauliflower are soft.
Pour contents into a Vitamix blender and blend on high until smooth. Return to pot.
Add coconut milk, cheese, salt, and pepper. Stir until cheese has melted.
Serve warm and enjoy!