Caulifower Soup

I picked up an onion and a head of cauliflower at the farmers' market this morning in anticipation of making a Paul Bertolli "Genius Recipe" I had seen on Food52. After less than $5 and 5 minutes of "active time," I had a luscious, velvety soup.

Please forgive me, but:

It tastes creamy and rich, but is vegan and quite healthy with just olive oil, onion, cauliflower, water and salt and pepper. All the online comments voiced initial incredulity about the ease and simplicity of the recipe followed by later admissions that it turns out delicious.

Here is the recipe:

INGREDIENTS:

olive oil (3T)
onion (1 medium), sliced thin
cauliflower (1 head very fresh, about 1-1/2 pounds), broken into florets 
salt, to taste
water (5 1/2 cups, divided)
extra virgin olive oil, to taste
freshly ground black pepper, to taste

DIRECTIONS:

1. Warm the olive oil in a heavy-bottomed pan. Sweat the onion in the olive oil over low heat without letting it brown for 15 minutes.
   
2. Add the cauliflower, salt to taste, and 1/2 cup water. Raise the heat slightly, cover the pot tightly and stew the cauliflower for 15 to 18 minutes, or until tender. Then add another 4 1/2 cups hot water, bring to a low simmer and cook an additional 20 minutes uncovered.
   
3. Working in batches, purée the soup in a blender to a very smooth, creamy consistency. Let the soup stand for 20 minutes. In this time it will thicken slightly.
   
4. Thin the soup with 1/2 cup hot water. Reheat the soup. Serve hot, drizzled with a thin stream of extra-virgin olive oil and freshly ground black pepper.

 My only change was to use an immersion blender to puree the soup. I did blend for a quite awhile to ensure it was as smooth as possible.

This is warming and satisfying on a grey, drizzly afternoon such as today. Enjoy!

--Simran