Pear Chutney

• 3/4 cup onion, diced
• 2 3/4 cup pear, diced
• 1 1/2 tablespoons butter
• 1/2 teaspoon garlic, minced
• 2 teaspoons candied ginger, minced
• 1 teaspoon mustard seed, dark
• 1 teaspoon mustard seed, light
• 1/4 teaspoon ground coriander
• 1 cup apple juice
• 1/4 cup brown sugar
• 1/4 teaspoon salt
• pinch cayenne
• 1 tablespoon rice wine vinegar