Transfer the vegetables to a blender, alternatively, if you have a hand
blender, transfer them to a large pot. Add 4 cups of broth and blend until smooth. Transfer to a large pot and bring to a low simmer. Add the thyme, sage, tarragon, salt and pepper. Add additional broth to reach the consistency you prefer, I like thick soup, so only used 4 to 4 ½ cups. Simmer until heated though and serve.