Place the fresh cranberries in a food processor and pulse until they are coarsely chopped. Transfer the chopped cranberries to a large bowl.

Add the cored and quartered apple to the food processor and pulse until finely chopped. Add the chopped apple to the bowl with the cranberries.

Add the orange (with seeds removed and ends trimmed) to the food processor and pulse until finely chopped. Transfer the chopped orange to the bowl with the cranberries and apple.

Add the granulated sugar to the bowl with the chopped cranberries, apple, and orange. Stir well to combine all the ingredients. Cover the bowl and refrigerate for at least one hour, or up to three days before serving. I like to make this a day ahead; the flavors really meld together beautifully overnight.

Serve the cranberry relish chilled. If desired, garnish with extra cranberries and a sprinkle of orange zest on top for a festive touch.