Use a microplane to zest the orange.
Cut the orange in half and juice it. You should end up with somewhere around ½ cup of orange juice. A little more or less is 100% fine. If it's a lot less, add more juice from another orange or — if you don't have one — add a little more apple cider than called for.
Instant Pot Cooking Instructions
Place all the ingredients into a 6-quart Instant Pot.
Position the lid and set the vent to sealing.
Cook on manual, high pressure, for 3 minutes. The pot will take 10 minutes or so to come up to pressure, during which time you'll see some steam escaping.
When the cooking time ends, carefully perform a manual pressure release.
Open the lid. Cancel the keep-warm function and then press the sauté button. Cook, stirring frequently, for just a few minutes, until the sauce is a little bit thicker. It will continue to thicken as it cools.
Cool to room temperature before serving.
Stovetop Cooking Instructions
Place all the ingredients into a medium pot with a heavy bottom.
Bring to a boil over high heat. Then reduce heat, cover, and simmer, stirring from time to time, until cranberries have burst, 30 to 45 minutes.
Uncover and simmer until thickened, keeping in mind that the sauce will continue to thicken as it cools.
Cool to room temperature before serving.