How To Attach Ceramic Soap Dish How To Re-attach A Ceramic Soap Dish?

How to re-attach a ceramic soap dish? - how to attach ceramic soap dish

The ceramic soap dish from the wall of my bath removed. There is no break and the wall seems to be very clean. It is surrounded by tiled bathroom standard square. What should I use to attach to a wall? Is there something special that I am to clean both surfaces in the first place? I assume that fixed and one for dry cement around the edges. I have never such projects before, so any help would be appreciated.