Cauliflower Cheddar Bacon Chowder (minus bacon if you don't want it)

I just made this yesterday and it was easy and delicious. It is easiest to chop/grate everything in a food processor but wouldn't be a big deal if you had to do it by hand. I also added some paprika and chile powder for more flavor.

Link with pics etc. http://iowagirleats.com/2012/09/25/bacon-cheddar-cauliflower-chowder-a-low-carb-alternative-to-baked-potato-soup/

Ingredients*:
8 slices center-cut bacon, chopped (half used for garnish)
1/2 small onion, chopped OR 1 teaspoon onion powder
1 celery stalk, chopped
2 garlic cloves, minced
salt & pepper
4 cups shredded or grated cauliflower (1/2 large head)
2 Tablespoons water
2 Tablespoons flour
2 cups chicken broth, divided
2 cups 2% milk
3-4 dashes hot sauce (or more or less)
2-1/2 cups (12oz) shredded sharp cheddar cheese, divided (half used for garnish)
2 green onions, chopped (optional)

Directions:

1. Whisk together flour and 1/4 cup chicken broth in a small bowl then set aside.
2. Saute bacon in a large soup pot over medium heat until crisp. Using a slotted spoon, transfer bacon to a paper towel-lined plate then remove all but 1 Tablespoon drippings from the pot. Add chopped onion (if using,) celery, and garlic to the pot then season with salt and pepper and saute until vegetables are tender, about 4-5 minutes.
3. Add cauliflower and onion powder (if using) to the pot then stir to combine. Add water then place a lid on top and steam cauliflower until tender, stirring a couple times, about 5-7 minutes. Add remaining chicken broth and milk then turn up heat and bring to a boil.
4. Slowly whisk in flour/chicken broth mixture while stirring, then turn down heat and simmer for 3-4 minutes, or until chowder has thickened. Turn off heat then stir in 2 cups cheddar cheese until smooth, then stir in half the cooked bacon. Taste and adjust salt, pepper, and/or hot sauce if necessary. Serve topped with remaining shredded cheese, cooked bacon, and green onions, if desired.