Cook the sausage in a very large skillet or a large pot over medium heat until no pink color remains. Remove with a slotted spoon to a paper towel-lined plate. Set aside.
Add the butter to the skillet or pan over medium high heat. When the butter melts, add the sweet potatoes, onions, celery, sage, half the salt, and half the pepper to the pot. Sauté until the onions are soft but do not allow them to brown. Add the orange juice and bring it to a boil. Cook until the sweet potatoes are nearly tender.
In a very large mixing bowl, combine the unseasoned cubed stuffing, sausage, sweet potato mixture, pecans, and raisins. Mix well. Season with the remaining salt and pepper adding more if you think the mixture needs it.
When ready to bake the stuffing, preheat the oven to 350 degrees. Heavily butter a 15x10 baking dish.
Beat together the eggs and chicken broth in a small bowl. Pour over the stuffing mixture and toss to combine. Transfer to the prepared baking dish.
Bake until the top is lightly browned and crisp around the edges (about 50 minutes). Cool slightly before serving.
Notes
Mixing the stuffing is easiest with your hands. Take off your jewelry, wash your hands well and just get in there!You'll need a very large 15" x 10" casserole dish for this recipe. If you don't have one that large, just use two or more smaller ones.Eggs act as the binder that holds all the stuffing ingredients together. However, if you're allergic to eggs or avoiding eggs for any reason, you can use any acceptable egg substitute.TO MAKE AHEAD: You can cook the sausage and saute the veggies up to two days ahead of time and store them, covered, in the refrigerator. A few hours before you're ready to bake the stuffing, remove them from the fridge and let them come to room temperature. Proceed with mixing and baking the stuffing.