You will need to allow the mixture to cool before handling, the mixture will look very crumbly at this stage and this is quite normal, kneading is the process that helps the mixture bind together to form a dough. I usually take a wide large dish/tray and tip all of the mixture into it and allow it to cool a little. It is best to knead the dough before it cools completely as it is more pliable whilst still warm, however be careful as the mixture will be EXTREMELY HOT immediately after cooking. Alternatively allow the entire mixture to cool in the pot till warm.