Wisconsin Cauliflower Soup

I have searched high and low for a GOOD ZUPA'S COPYCAT Wisconsin Cauliflower soup recipe. I've tried a bunch. THIS ONE IS EVEN BETTER THAN THE ORIGINAL!!

I took ideas from a few different recipes and came up with this. My 14 year old (picky picky eater) claims this is better than the Zupa's soup. I agree!!

Wisconsin Cauliflower Soup (Zupa's copycat)

3 Tbsp butter
2 lbs cauliflower florets, roughly chopped
1 medium onion, chopped
1/4 c AP flour
16 oz chicken stock
1 pint heavy cream
1 1/2 c water
8 oz pepper jack cheese, shredded
16 oz sharp cheddar cheese, shredded (keep some for garnish)
1 1/2 t Dijon mustard
2 tsp salt
2 tsp pepper

In a large pot, melt butter over medium low heat. Add onions and cook about 5 minutes until translucent. Whisk in the flour and let cook for about 1 minute. Add the chicken stock, heavy cream and water. Add cauliflower and heat until boiling. Reduce heat and cook about 15 minutes - until the cauliflower is cooked through.

Transfer to a blender in batches to blend the soup to a luxurious texture.

Transfer back to cooking pot, add salt, pepper, Dijon and cheese a little at a time to let it incorporate into the soup. Cook for about 10 minutes to allow it all to come together. Serve warm!