Cauliflower Soup with Balsamic Onions and Wilted Lettuce
This recipe is from "Raw" by Charlie Trotter and Roxanne Klein.
In a high-speed blender, combine cauliflower, oil, vinegar, and water. Season with salt and pepper. Process until smooth and thick. Pass through a medium sieve. Taste and adjust for seasoning.
Divide the soup between 4 bowls. Arrange lettuce and red onion slices around the bowl, and spoon on some of the reserved onion marinating juices. Serve immediately.