Over 30 million microwave cookers are sold annually throughout the world. Let's say they last five years - probably optimistic. What happens to all those toughened glass microwave plates that cannot go in with the normal glass recycling?
Here's one idea. Enjoying the 'nautical metaphor' of bathrooms as ships' cabins, I cut and trimmed a circular hole in a bathroom door and fixed an old microwave plate over it. The lip round the outside matches perfectly some cut down 2.5mm2 cable clips.
The light transmission leaves something to be desired but the dimples are perfect for modesty.