1 can cream of mushroom soup
1 can mushrooms, sliced
1/2 c. mayonnaise
1 c. cooked broccoli, firm to fork
6 oz. wide egg noodles, cooked
1 sm. onion, chopped
1 can tuna
Bread crumbs
Celery salt
Milk

In a 2 quart greased casserole, combine soup and mayonnaise; beat until smooth. Add remaining ingredients, except crumbs and milk. Mix thoroughly. Add just enough milk to cover noodles, and mix. Top with bread crumbs. Cover and bake at 350 degrees for 40 minutes.