How To: Make celeriac soup or cream of celery root soup

To make a celeriac soup, first chop all the vegetables. Then put them into the vessel and light the stove. Next, add a little salt and stir it up. Add 2 spoons of flour, then 4 cups of chicken sour. Finally, add some black pepper, stir it well and allow it to boil for 30 minutes. After that, blend it well and serve it.