4. puree with an immersion blender or in a blender or food processor (do this in small batches to avoid splashes and burns).
5. add salt to taste.(do this at the temperature at which you plan to serve the soup; chilled soup will need more salt than hot soup because cold dulls flavor.) you will need to add a fair amount of salt if you used water as your base liquid. Keep adding salt, about ¼ tsp. at a time, and tasting until you notice a jump in the corny flavor.
6. garnish with roasted. Chile, avocado, tomato, or cilantro, if you like.