Sharp Bread Stuffing

4 c unseasoned dried sour dough bread cubes
1 1/2 c chopped celery
1 1/3 c sliced mushrooms
1 lb mild Italian sausage
3 TB chopped red onion (optional)
1 c butter or more
1 1/2 tsp Bell or other poultry seasoning
Hot chicken broth or hot water to moisten

Put bread cubes in a large pan, add seasoning. Cook sausage, drain, and pour over bread. Cook celery in butter and add to mix. Cook mushrooms in butter and add to mix. If using onion, cook in butter and add last. Mix ingredients, taste, and if necessary add more poultry seasoning. Add broth or hot water to keep stuffing together. This makes enough to stuff a 4-5 pound chicken. Double for a 10 pound turkey. If not using as stuffing, cook in oven at 350 degress for 45 minutes to 1 hour.