Serves: 4Preparation Time: 45 minutes
Instructions:Melt butter in heavy large pot over medium heat. Add celery root, apples, and onion. Cook until apples and some of celery root are translucent (do not brown), stirring often, about 15 minutes. Add 4 cups broth. Cover and bring to simmer. Reduce heat to medium-low; simmer covered until celery root and apples are soft, stirring occasionally, about 25 minutes. Remove from heat; cool slightly. Working in batches, puree soup in blender until smooth, adding more broth by 1/4 cupfuls to thin to desired consistency. Return soup to pot. Season to taste with salt and pepper. Ladle into bowls and garnish with bleu cheese.