Take a food processor container and place half of the cranberries and half of the orange slices in the container.
Keep processing the ingredients in the food processor until both the ingredients are finely chopped.
Now, transfer the chopped ingredients to a bowl.
Continue the same with the remaining cranberries as well as oranges.
Stir the sugar into the mixture now.
You can easily store this Cranberry Orange Relish in the refrigerator or a freezer.