Casserole - beans, taters, chicken, cheese - super easy

Delicious one dish meal -
4 cups baked potatoes (peeled, chunked),
1 cup shredded cooked chicken,
4 ounces mozzarella cheese - cut into small bits
4 ounces mild cheddar cheese - cut into small bits,
1 can (1 1/2 cups) beans (drained of any broth) - any type will do, but I used black beans/kidney beans/pinto beans mixed.

Mix all a glass casserole dish (cake pan sized).  Cover with foil.  Bake at 350 for 1 hour.