Turkey Soup with Dressing Dumplings

Name: Turkey Soup with Dressing Dumplings
Prep time: 2 h
Cook time: 2 h
Total time: 4 h
Cuisine: American
Ingredients: 1 roast turkey carcass; 6 quarts water; 4 medium onions; 6 medium carrots; 5 stalks celery; 6 cups leftover stuffing; 6 egg whites; cooking spray; 1 cup peas; 1 cup corn kernels; 1 cup cubed turnips; 1 cup fresh green beans, trimmed; 1 (16 ounce) can jellied cranberry sauce; 1 (16 ounce) can whole berry cranberry sauce; 1 tablespoon poultry seasoning, such as Bell's; salt and pepper to taste