Butter 2 slices bread. Cut into cubes and set aside. Cut remaining bread into cubes and place 1/2 in bottom of baking dish.
Combine chicken, vegetables, mayonnaise, salt and dash of pepper; spoon over bread cubes. Sprinkle remaining cubes over chicken mixture. Combine eggs and milk. Pour over all.
Cover and chill 1 hour or overnight. Spoon soup over top. Sprinkle with buttered cubes. Bake at 325 degrees for 50 minutes or until set. Sprinkle cheese over top last few minutes of baking.