Cover a baking sheet with parchment paper.
Spread the meat and vegetable puree across the parchment covered baking sheet.
Make sure you have a level and even spread of the meat puree across the baking sheet.
Place the baking sheet in a 250 degree F. oven for 2 hours.
After 2 hours, gently life the meat sheet and see how it's doing. Break the meat sheet into pieces and return to the oven for another 2 hours.
Continue to do this until your puree is completely dry.