Buy the sausage for this dressing from a butcher shop that makes its own—you can ask the butcher to sell you a pound without the casings and save yourself a few minutes of prep work. Slideshow: More Holiday Stuffings and Dressings Plus: Ultimate Thanksgiving Guide
Preheat the oven to 425° and generously butter 2 medium baking dishes that are at least 2 inches deep. Melt the butter in a large skillet. Add the celery and onions and cook over moderate heat until softened, about 5 minutes. Add the sausage and cook, stirring, just until it loses its pink color, about 7 minutes.
In a large bowl, toss the bread cubes with the prunes, apples, parsley and sage. Add the sausage mixture and season with the salt, pepper and nutmeg. Add the eggs and reserved turkey stock and mix well. Divide the stuffing between the prepared baking dishes. Cover with foil and bake for 20 minutes. Remove the foil and bake for about 10 minutes longer, or until heated through and browned on top. Let cool slightly before serving.
The stuffing without the eggs and turkey stock can be refrigerated overnight; the final ingredients should be added just before baking.