- Slice ginger thinly.
- Remove bones from mackerel fillets. Cut a fillet in half.
- Mix ginger slices, water, sugar, sake, and 4 tbsps of miso in a pan and put on medium heat for 2-3 minutes.
- In another pan, add mackere. Simmer fish for about 10 minutes on low heat, pouring the sauce over the mackerel.
- Add 2 tbsps of miso in the sauce at last and stir well. Stop the heat.
Serve the mackerel with miso sauce.