Preheat oven to 350 degrees. Layer stuffing into a greased baking dish. Whisk water and gravy together, and pour evenly over stuffing. Gently stir with a fork to make sure gravy goes down into stuffing. Leave a few bits of stuffing poking out on top, so they'll get browned in the oven.
Bake uncovered at 350 degrees for about 30 minutes, until stuffing absorbs liquid and a few bits are browned on top. Enjoy!