Sage, Sausage and Apple Dressing

Name: Sage, Sausage and Apple Dressing
Yield: 8-10
Ingredients: 1 lb Sage sausage, fresh; 1 Celery with, ribs leaves; 2 Cooking apples; 1/4 cup Flat-leaf parsley, fresh; 1 Onion, medium; 2 Eggs, large; 3 cups Chicken broth, canned homemade or low-sodium; 1 16-ounce bag Stuffing cubes; 1 Kosher salt; 1/2 cup Walnut pieces; 6 tbsp Butter, unsalted