Using a food processor fitted with the metal blade or a blender, blend the beans with 1/2 to 1 cup of the chicken broth, green chilies, jalapeño, and tomato sauce. You may have to do this in several batches.
Heat the blended beans with the remaining chicken broth and sherry in a large saucepan over medium heat, stirring occasionally, until hot. Season to taste with salt. Ladle into warm soup bowls. Serve the soup with bowls of garnish.
SERVING SUGGESTIONS: Garnish with cheddar cheese, fresh tomatoes, Poblano cream, or sour cream. If using Poblano Cream or sour cream as a garnish, put it in a small zip-lock bag. Snip the corner with scissors and then drizzle cream on the hot soup.
Advanced Preparation: The soup may be prepared a day in advance. It may be necessary to add a little chicken stock when reheating.