Mushroom Surprise

Saute mushrooms, coarsely sliced, in butter, just enough to smell like mushrooms.

Butter 3 slices white bread, cut in 1-inch squares and line casserole.

Combine mushrooms with 1/2 cup each: chopped celery, onion, green pepper and mayonnaise, 3/4 teaspoon salt, 1/4 teaspoon pepper and 3 more slices of buttered bread. Pour eggs, slightly beaten with milk.

Refrigerate 1 hour or overnight.

One hour before serving, spoon a can of undiluted mushroom soup over it.

Bake at 300° for 60 to 70 minutes or at 325° for 50 to 60 minutes.

About 10 minutes before it's done, sprinkle grated yellow cheese on top.