Cook on low, approximately 4 hours, giving it a quick stir about once every hour.
While pudding is cooking, pour yourself a glass of rum. Okay, now pour another glass (this one's for our recipe) and drop in some dried cranberries. Store in the fridge until ready to serve.
Serve warm or cold, garnished with a sprinkle of nutmeg, a dash of cinnamon, and some rum soaked cranberries. (If you prefer your pudding cold, stir in some milk when you're ready to serve and it will come right back to the correct consistency!)