Begin by oiling or greasing your mold- don't forget to do this! I recommend a 6-inch springform pan for a mold.
Next, remove apple peel and core.
Run apple through food processor or finely chop.
Add chopped apple, cranberries, cranberry juice, and sugar in pot and bring to a boil over high heat.
Once the sauce is boiling turn the heat down to medium and continue to boil gently, stirring often, for approximately 20 minutes or until sauce is really thick like pudding. It will be really hot and bubbly.
If desired, add 2 tbsps. of orange liqueur at this point.
Pour sauce into greased mold. If you use a springform pan then place the filled pan on a plate to catch any juices that seep out the bottom.
Refrigerate mold until firm.
Serve with your Thanksgiving dinner!