Preheat the oven to 400 degrees
Prepare your baking dish with cooking spray (Either one 9x13 or two 8x8 pans)
Mix the onion, celery, cornbread, saltines, boiled eggs, parsley, poultry seasoning, sage, pepper, salt and butter together in a large bowl.
Pour the beaten eggs over the mixture and gently mix together.
Using a rubber spatula to mix as you go, pour about ⅓ of the stock into the cornbread ingredients. Then add the next ⅓. When the cornbread looks like cereal that has sat WAY too long in a bowl, it is done. It should not be soupy, just very wet. Add more or less chicken stock based on your assessment of the situation.
Pour your dressing into the prepared pan/s and bake uncovered for an hour until the dressing is lightly browned across the top.