Preheat oven to 350 degrees.
Place chopped celery and onion in pan, add water until vegetables are just covered. Boil until softened.
Heat chicken broth in a separate pan.
Slightly beat eggs in small bowl and stir in milk.
Combine stuffing mix and bread pieces in large bowl. Pour cooked celery/onion with water over bread/stuffing mix. Pour in heated chicken broth and egg mixture. Stir to combine. Add in hot turkey drippings a cup at a time until the whole mixture has the consistently of wet gloppy oatmeal.
Spray 9x13-inch pan with cooking spray. Pour in stuffing mixture. Bake 45 minutes or more in a 350-degree oven.