Saute onion, garlic, carrots, and celery in butter until vegetables begin to soften.
Place vegetables in a large soup pot and add cauliflower, bay leaf, and chicken broth.
Bring to a boil and simmer over medium-low heat until cauliflower is softened.
Taste chowder and add seasoned pepper and salt if needed.
Garnish with fresh parsley if desired.
