Sometime ago Belmer (I think) posted a design for microwave bowl protectors......I thought they were a briliant idea....and would certainly sell well at craft fayres.
You could really expand the idea as I think they would help keep the food warm and you could make casserole covers etc......anyway just a thought.
I have just searched and hopefully this will take you to the tutorial
http://www.quiltingboard.com/tutoria...s-t144848.html