Soy-Ginger Fried Mackerel (鯖の竜田揚げ, Saba no Tatsuta-age)

Ingredients

Equipment Needed

• •Deep heavy pot or wok
• •Thermometer, or a long cooking chopstick for checking bubbles
• •Wire rack set over a tray
• •Fine grater for ginger and daikon

Instructions

1. 1

   Check the fish

   Pat the mackerel dry and smell it before you begin. It should smell clean and faintly of the sea, not sharp or sour. If the fish is not fresh, change the dish and cook something else. Tatsuta-age is seasoning, not a disguise.

   Saba is best in the cool months, especially autumn into winter, when the flesh is richer. That shun matters because the oil in good mackerel keeps it tender through frying.
2. 2

   Cut the fillets

   Cut each fillet crosswise into pieces about 4 cm wide. If the skin is thick, make one shallow slash through the skin of each piece. This helps the marinade reach the flesh and keeps the pieces from curling hard in the oil.

3. 3

   Marinate briefly

   Mix the soy sauce, sake, mirin, grated ginger and its juice, and the garlic if using. Add the mackerel and turn each piece so it is coated. Leave it for 15 minutes, turning once. Longer is not better here: the soy can toughen the surface and make the fish too salty before the center has any chance to speak.

   The sake softens the fish's stronger edge, the soy seasons it, and the ginger keeps the flavor clean. This is the two-seasoning foundation at work, with ginger as the quiet hand.
4. 4

   Dry and starch

   Lift the fish from the marinade and wipe each piece with paper towel until damp, not wet. Dredge in potato starch, pressing lightly into the skin side and cut faces, then shake off every loose clump. The starch should look like a thin frost, not a winter coat.

   Wet marinade burns before the fish cooks. Loose starch falls into the oil and makes it dusty. The clean crust comes from a thin, even coat.
5. 5

   Heat the oil

   Heat the oil in a deep pot to 170 C. If you don't use a thermometer, drop in a pinch of starch: it should sink halfway, then rise with small lively bubbles. Too cool and the coating drinks oil. Too hot and the soy-dark surface browns before the flesh is done.

6. 6

   Fry in batches

   Slide in a few pieces of mackerel, skin side down first, leaving space between them. Fry for 3 to 4 minutes, turning once, until the crust is crisp, the color is deep golden brown, and the bubbles around each piece become smaller and quieter. Crowding drops the oil temperature and gives you heavy fish. Two calm batches beat one crowded pot.

7. 7

   Drain and serve

   Lift the fish to a rack, not a flat plate, so the crust stays dry. Taste one piece while it is still warm. If it needs salt, use only a few grains. Serve with grated daikon and a wedge of lemon or sudachi. The daikon cuts the richness, and the citrus brightens the soy without covering the mackerel.

Chef Tips

• •Ask the fishmonger what mackerel came in today, and buy the firm, bright-eyed fish with shiny skin and no strong smell. Sourcing first, always. No marinade rescues tired saba.
• •Use potato starch if you can. Katakuriko is the Japanese name, once made from dogtooth violet and now usually from potato. Cornstarch will fry, but the crust is finer and drier with potato starch.
• •Marinate only briefly. Saba has enough character of its own, and the point is to season it plainly, not soak it into submission. Fifteen minutes is plenty.
• •For bento, let the fried fish cool fully on a rack before packing. A closed box traps moisture, and moisture softens the crust faster than any cook deserves.

Advance Preparation

• •The marinade can be mixed one day ahead and kept refrigerated.
• •The mackerel can be cut and kept covered in the refrigerator for several hours, but marinate it only 15 minutes before frying.
• •Fried saba keeps one day refrigerated. Reheat on a rack in a 190 C oven or toaster oven until the surface crisps again; do not microwave it unless softness is the goal.

Frequently Asked Questions

Nutrition Information

1 serving (about 200g)