Pre-Heat oven to 375F.
Using your hands pull the bread apart into bite-sized chunks. In a large bowl combine bread with roughly chopped cornbread.
Chop onion, celery, and 1 package of sage. Add to bread mixture
Add egg, cranberries, chicken stock, and seasonings. Stir to combine. The mixture should resemble a very thick pancake batter Prepare a deep baking dish with some cooking spray or butter and pour the bread mixture into the prepared baking dish. Cover with foil and bake for 45 minutes. Remove the foil and bake for 5 minutes longer to brown the top.