This is a fast recipe once you cracked those coconuts, and SO worth the effort. I take this soup to work and heat it gently on an electric coffee mug warmer, stirring every 5 minutes or so to keep a hot spot from developing. Or make it with warm water. You can find Thai coconut (or young coconuts) at Whole Foods or for half the price at an Asian market. They look like little white round roofed huts. To open them, whack at the top with a cleaver or heavy butcher knife. Once you have a slit, turn it upside down to drain the juice. Complete cutting off the top and scrape out the coconut meat with a spoon or spatula. It is soft and jelly-like. You will LOVE this soup. It has a true gourmet flavor.