1 packet sugar free jello – cranberry flavor if you can find it
Put the cranberries, celery and orange (with its skin on) in a food processor and pulse until all ingredients are finely chopped – but not into a paste. Pour cranberry mixture in a bowl and add finely chopped apple, walnuts and sugar. Leave in the fridge over night – this allows all the juices from the fruit to seep out.
After 8 hours or overnight, add in the packet of jello and stir to combine. Again, stick the mixture back into the fridge and allow to set for about 4-6 hours. Sauce should last about 2 weeks covered in the fridge.