In a large soup pot, add olive oil and onions and sweat onions over medium heat until translucent. Add garlic and cook for 1 to 2 minutes.

Add cauliflower and broth to pot. Make sure the broth is level or just above cauliflower. You can add water if needed. Add salt and pepper and stir.

Bring to a boil then cover and turn to low heat. Simmer for about 30 minutes or until the cauliflower is very soft.

Working in batches, ladel cauliflower and broth into a blender and blend until smooth. You can pour the blended soup in a large bowl or another pot until the batches are done.

After blending return soup to the pot, stir, and bring to a simmer. Add salt and/or pepper to taste.

Optional: Stir in 1/2 to 1 cup of heavy cream.