This is one of those casseroles with many versions. What makes mine somewhat different is the use of rotisserie chicken, there are also no tomatoes, as well as some other slight differences. This is a kid pleaser and makes a nice potluck dish. If you can't find the chicken soup with herbs in it, just use regular Cream of Chicken and add a bit of dried herbs (perhaps 1 tsp of mixed dried green herbs). I used the reduced sodium versions of the soup because otherwise the sauce base can be too heavy and salty. If you dislike cream of mushroom, you may use a different flavor of "cream of..." soup however.