1. Take a few pieces of cauliflower out of the bag, and place on a cookie sheet. Drizzle with some oil and roast in the oven on 400 degrees Fahrenheit for 40 minutes. Store in a container until ready to serve as garnish.
2. In a soup pot, heat the oil and sauté the onions and garlic for about five to seven minutes or until glassy.
3. Add the rest of the cauliflower, water, salt, and pepper. Cover and simmer for about one hour.
4. Blend with an immersion blender.