Curried Cauliflower Soup

This soup is so good that it's converted two determined cauliflower haters (not me--I love the stuff). Depending on one's taste, it can be made spicier or milder but it's always good. With chicken stock, it's a bit richer, but the versions made with vegetable stock and even with water are really quite delicious. I personally like it strained through fine mesh which it makes really velvety, but those to whom I've served it don't mind it unstrained at all.