Prepare rice. Brown sausage. Drain excess grease from sausage.
Boil celery and onion in water. Drain, saving one cup of this water.
Mix rice, sausage, celery, onion, and poultry seasoning in baking dish. Add soup and 1 cup water saved from vegetables.
Bake 1-1/2 hours at 325 degrees F. Stir about 15 minutes before baking is complete.