Preheat Cook&Hold to 325F (163C).
Place cranberries into a 2" hotel pan.
Combine and mix orange juice, orange zest, sugar and 3/4c water with the cranberries.
Once the oven is preheated, place the hotel pan into the cook&hold and cook at 325F (163C) - for 5 to 6 hours (depending on desired thickness).
When finished, remove the hotel pan from the oven.
Serve or store for later use.