Secondary dashi is ideal for thick soups, noodle broths, or as a cooking stock for vegetables and meat. It is a great way of using up konbu and bonito fish flakes left over from Primary Dashi.
Ingredients
bonito fish flakes and konbu reserved from Primary Dashi
Place the reserved bonito fish flakes and konbu from the Primary Dashi and the measured water in a pan. Place the pan over a high heat until it just reaches boiling point, then reduce the heat and gently simmer until the stock is reduced by at least a third, or up to half depending on the desired strength of flavour; this should take about 20 minutes.