Chicken Sandwich Casserole
Sprinkle the chicken, celery and onion on top of the bread, then cover with the other 6 slices of toasted bread.
In a medium bowl mix together the beaten eggs, mayonnaise, milk and salt and pepper to taste.
Pour this mixture over the sandwiches, then top with soup; cover baking dish and refrigerate overnight.
Preheat oven to 325F. Bake dish, covered, for 45 minutes; remove cover, sprinkle with cheese, and bake for another 30 minutes, uncovered. Remove from oven and let cool and set for 10 minutes before serving.
Makes 4 to 6 servings.