Cream of Celery Soup

I can't take full credit for this recipe. A friend of mine created it and I just twisted it a bit. Her original can be found on her website Homestead Letters. The link is on Life on the Homestead.
Part of eating from the homestead is not wasting food or running out to eat fast food, it is using what you have. I ended up with 2 heads of celery this past week and the first needed to be used quickly. With the exception of the celery everything in this recipe came from the farm. My original thought was to add cream at the end but it was so delicious as is, I left well enough alone. Enjoy!
                                                         Cream of Celery Soup
                                                   1 whole head of celery, cut up
                                                   2 heads of roasted garlic (yes whole heads!)
                                                   1/2 large onion, chopped
                                                    crumbled dried sage and parsley to taste
                                                    dash of white pepper
                                                   1 quart chicken stock
Put all ingredients in a pot, cover and simmer until tender. Process in blender until smooth and creamy. You may need to check to make sure the strings are fully ground, I had to process twice.