Apple Cranberry Relish

(recipe from Saveur magazine)

1/8 cup olive oil
6 cloves garlic, minced
1/2 medium yellow onion, thinly sliced
2 cups fresh or frozen and defrosted cranberries
1 sweet apple, cored, peeled, and roughly chopped
1 1/4 cups unsweetened apple juice
Kosher salt and freshly ground black pepper, to taste

Heat oil in a large saucepan over medium heat.  Cook garlic and onion until soft, 6-8 minutes.  Add cranberries and apples; cook until cranberries burst and apples are tender, about 15 minutes.  Add apple juice, salt, and pepper; bring to a boil.  Reduce heat to simmer; cook, stirring occasionally, until mixture is slightly dry, about 45 minutes.  Let cool slightly and transfer to a food processor; pulse until coarsely ground.  Serve cold or at room temperature.