Sangayaki (Miso-Pounded Mackerel Grilled in Shells)

Quick answer

Total time: 40 min
Level: Medium
Servings: 5 servings
Ingredients: 7

About this dish

Sangayaki is the grilled form of namero, the finely pounded fish preparation associated with fishermen around Chiba's Boso Peninsula.

A whole mackerel is filleted, skinned, and cleared of bones before the flesh is chopped with a knife. Miso is added and the mixture is pounded again until distinctly sticky, which helps it stay tender and cohesive during grilling. Julienned ginger, minced onion, and green pepper are folded in. The mixture is packed level into five clean abalone shells, covered with a shiso leaf, and placed over heat. It is done when the fish has puffed up, the center is opaque, and no raw mixture remains. The dish recalls fishermen carrying namero in abalone shells when they went to work in the mountains, then steaming or grilling it at their huts.

Ingredients (5 servings)

Ingredient	Amount	Unit
whole mackerel	1	ea
miso	2	tbsp
ginger	20	g
onion	0.5	ea
green pepper	1	ea
shiso leaves	5	sheet
clean abalone shells	5	piece

Instructions

Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.

5 steps

1

Prep

Fillet the mackerel into three sections and remove the skin.

Check carefully for pin bones and remove them, then chop the fish flesh finely with a knife.
2

Prep

Add the miso to the chopped mackerel and continue pounding, gathering the mixture repeatedly with the blade.

Stop when it is sticky enough to lift together as a cohesive mass.
3

Prep

Cut the ginger into fine matchsticks and mince the onion and green pepper.

Fold all three vegetables into the sticky mackerel and miso mixture until evenly distributed.
4

Control

Divide the mixture among five clean, dry abalone shells and level it flush with each rim.

Cover the filling in each shell with one shiso leaf.
5

Finish

Set the shells securely on a grill rack and cook over medium heat.

Remove them when the fish has puffed up, the center is fully opaque, and no raw mixture remains, then serve promptly.

Practical Cooking Checks

The cues that matter most while cooking.

Key technique: Mackerel and miso are pounded with a knife until distinctly sticky.
Finish cue: Remove them when the fish has puffed up, the center is fully opaque, and no raw mixture remains, then serve promptly.
Substitution: If abalone shells are unavailable, divide the mixture to the same thickness among five small, stable heatproof dishes.