Mom's Bread Stuffing/Dressing

4 cups unseasoned dried sour dough bread cubes

1 1/2 cups chopped celery

1 1/3 cups sliced mushrooms

1 pound mild Italian sausage

3 tablespoons chopped red onion (optional)

1 cup butter or more

1 ½ 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 the 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˚ for 45 minutes to 1 hour.