I loved the Broccoli Soup I was getting in the restaurants but they were rare on "Good" soup. Therefore, I now make my own and everyone loves it. This is also good if you have some grilled Chicken to chop up and throw in.
In a large pot sauté, Onion & Celery if used, when translucent, place 2-3 cups of water in pot and bring to a boil. Add Cauliflower & Broccoli, cover and cook over medium heat, until just before tender, about 5 minutes. Do not drain water. Add bouillon ( I use a soup base, not the cubes) to water and then add all the soups. Mix and add additional water to the desired thickness. I also use a Stick Blender at this time to chop up some of the larger chunks of the Broccoli & Cauliflower, be careful not to pulverize all of the chunks. Leave some of the chunks to give it texture. I then add some fine grated cheese to the top of the bowls and some flavored croutons.