Spinach Gratin is rich, creamy, and cheesy and this recipe rivals any steakhouse !  This easy to make side is an elegant twist on our favorite creamed spinach recipe  and perfect served next to a ribeye steak !   An Easy Cheesy Side  You may be familiar with  Potatoes Au Gratin  but honestly, a gratin can refer to almost anything covered with breadcrumbs or cheese and in this case, I use a bit of both.   A quick cheesy stovetop creamed spinach is the base of this recipe.  This can be made with either fresh or frozen  spinach.  Spinach Gratin can be made ahead of time .  A topping of browned and bubbly cheese takes this to the next level.    Ingredients  SPINACH  Chopped fresh spinach  will work just as well for this recipe, but I find it easier (and less expensive) to use frozen spinach that comes in 10-ounce packages. Allow the spinach to thaw and drain in a colander.  SAUCE  Cream and cream cheese thicken this recipe without having to make a roux . The addition of shredded cheese...