In a blender, combine the spinach and water and puree for 1 minute. Strain through a strainer lined with a triple layer of cheesecloth held over a small saucepan. Discard the contents of the strainer. Line the strainer with a coffee filter or a paper towel and set aside.
Place the saucepan over medium heat and heat, watching closely, for about 2 minutes, or until the green in the liquid