Crumble and brown sausage. Saute onions and celery until soft, then add mushrooms for approximately 2 minutes. Drain all grease. In large bowl, add to stuffing mix. Slowly sprinkle seasonings while stirring until well blended. Add broth, stir until well blended then drizzle butter while stirring. Bake in a covered casserole dish at 350° for 35 minutes.
This may also be stuffed into your turkey by spooning it in the cavity loosely then pinning the bird to hold the stuffing. Bake according to directions on turkey.