This is a wonderful, easy recipe. Dairy free, no cook, quick to make! Perfect for entertaining in the summer. I "adjusted" the original of this recipe which came from "Vegetarian Cooking for Everyone", a fabulous cookbook by Deborah Madison which won Julia Child and James Beard awards (I'm not vegetarian, it's just a great book!). I always keep Costco's 3 Berry Mix in my freezer. I use these frozen berries, but use fresh if you prefer. I like the texture the thawing berry's have in the soup as well as the unexpected chill they add to each bite. This is really an easy recipe to adapt, be creative, go wild! * Note: I bought a VitaMix and pureed the watermelon, but it completely liquified. You want a puree, not liquid, so "pulses" is important, maybe on lowest setting. You can almost make a puree just by mashing the pulp if you don't have a blender.