photo: mixedgreensblog.com

4 Granny Smith apples, peeled and chopped
1 onion, finely chopped
1-1/2 cups cider vinegar
1-1/4 cups brown sugar
¾ cup golden raisins
¼ cup minced fresh ginger
½ teaspoon red chili flakes
¼ cup chopped cilantro (optional)

In a large saucepan, combine the apples, onion, vinegar, brown sugar, raisins and chili flakes. Bring to a boil; reduce heat and simmer for about 40 minutes. Remove from heat and stir in cilantro if desired. Cool completely and store in an airtight container in the refrigerator.