Saus Ponzu buatan sendiri

Bahan-bahan (1 porsi)

• ½ cup soy sauce
• ½ cup citrus juice ((a mixture of lemon, orange, and/or grapefruit juices))
• zest from one lemon
• 2 Tbsp mirin ((or substitute 2 tsp sugar + 2 Tbsp sake or water))
• ½ cup katsuobushi (dried bonito flakes)
• 1 piece kombu (dried kelp) ((2 x 3 inches, 5 x 7.6 cm, 6 g per piece))