I just got a small amount of powder and mixed it to a thickish paste and put 3 small blobs on a plate (some people use baking parchment, which apparently works well) and put in microwave for about 50 secs - you may need to go more or less - depends on your microwave and be careful not to burn!! Usually I get 30 crisps out of a packet of soup, but just wanted to try a few to see if I liked.
There is a thread of recipes on this site - worth having a look through.