Mat Ganjang Korean Flavored Soy Sauce

Ingredients

• 5 cups (1.2 liter) soy sauce
• 1 cup mirin, seasoned rice wine or apple juice
• 1/2 cup maesilaek, Korean green plum extract or apple juice
• 1/2 cup sugar
• 2 apples, cut into halves
• 1 pear, cut into half
• 2 large onions, cut into halves
• 2 bulbs garlic, cut into halves
• 3 to 4 large slices ginger
• 1 tbsp black peppercorns
• 3 dried whole shiitake mushrooms or handful sliced dried shiitake mushrooms 
• 1 tbsp goji berries
• 2 of 5×5” dried kelp (kombu) sheets