Drain liquid from the Fri-Chik and Mushrooms, and add enough water to equal 1 cup.
Cut the Fri-chik into small pieces.
Pour the reserved liquid over the croutons.
Saute the onions, celery, celery tops and mushrooms together until tender in the vegetable oil.
Add the seasonings, Fri-Chik, and sauted ingredients to the croutons. Mix well. Dressing is moist enough if it can be squeezed in your hand, but not dripping. Add additional water if necessary.
Bake in casserole dish sprayed with vegetable oil, at 350 degrees for about 30 minutes.