I make this all the time for my fiance. However, I make it using lasagna, Idahoan instant garlic mashed potatoes, cream cheese, fresh garlic, onion (occasionally), and mozzarella cheese.
I also add steamed broccoli and chicken to the mashed potato mixture now and it is absolutely delicious. This casserole usually lasts us a couple days and is a frequent request. A family favorite and We LOVE it!