Company Chicken Casserole

6 half chicken breasts, cooked, cooled and cut into small pieces.
2 c. cooked rice
1 and 1/2 c diced celery
1 small onion, chopped
1 and 1/2 c. mayonnaise
3 cans cream of chicken soup
1 (5-6 oz) pkg slivered almonds
3/4 tsp salt
1 cup mushrooms ( I saute fresh sliced mushrooms in butter, we like them better than the canned mushrooms) but either will work.
Topping:

Buttered bread crumbs

Combine all ingredients in a 9x13 inch casserole dish. Cover with buttered bread crumbs. Cook uncovered at 350 F for 30-40 minutes.