Rinse the cranberries under cold water.
Zest the oranges, into a medium sized, heavy bottom saucepan.
Add the cranberries into the same saucepan as the orange zest.
Juice your oranges, and add the juice into that pan.
Add in the brown sugar, cinnamon, and nutmeg, and turn saucepan on to medium heat.
Bring to a gentle boil, give it a few stirs.
Reduce heat to low and simmer for 10 to 15 minutes, until thick.
Simmer longer if needed to reach your desired consistency.
Pour into a dish, cover, and store in fridge for at least 2 hours to cool.
Transfer to Hefty bags and put in the freezer until the day before you want to use it, at which time, put it in the fridge and let it defrost overnight.