After 5 minutes, remove from heat and add 2 cups of Bonito flakes; allow to steep for a few minutes.

五分钟后熄火，加入松鱼片浸泡几分钟。

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First make the Japanese soup stock, or dashi: In a 4-quart saucepan, combine 3 quarts of water, the kelp, and bonito flakes and place over medium-low heat.

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First, the primary dashi, which functions as this soup's broth, comes together when a pot of water with kombu is boiled and bonito flakes are tossed in.

WSJ: Amaryll Schwertner's Poached Halibut in Dashi With Leeks, Sweet Potatoes and Sesame Seeds | Slow Food Fast

Now for what Ms. Schwertner calls the secondary dashi, which serves as the poaching liquid for the halibut: Add the reserved bonito flakes and kombu to a pot with water and Meyer lemon slices.

WSJ: Amaryll Schwertner's Poached Halibut in Dashi With Leeks, Sweet Potatoes and Sesame Seeds | Slow Food Fast