Prep your fruit and measure your sugar.
In a saucepan, bring your water (or substitute orange juice) and sugar to a boil.
Add cranberries.
Boil for 5 minutes.
Add the diced apple and orange zest.
Lower heat so that it is at a boil, but not rolling boil. Cook for 5 minutes. Remember to watch and stir the sauce every few minutes.
Remove from heat. Transfer to a serving bowl. Allow to cool. Allow to chill in the refrigerator for at least 2 hours, or overnight before serving.