For an extra layer of flavor, consider roasting the cauliflower florets before adding them to the soup. Toss with olive oil, salt, and pepper, and roast at 400°F (200°C) for about 20-25 minutes, or until tender and slightly browned. To make this soup vegetarian, substitute vegetable broth for chicken broth. Garnish with extra shredded Cheddar cheese, fresh parsley, or a swirl of cream before serving.