Vinegar Cured Mackerel Sushi with Shiro-ita Kelp バッテラ

“Battera バッテラ” is a type of molded sushi or “oshizushi 押し寿司” popular in the Osaka 大阪 region. It is made from vinegar cured mackerel or “shime-saba しめ鯖” and specially prepared kelp called “shiro-ita konbu 白板昆布” (more description later). I posted molded sushi using vinegar cured mackerel and smoked salmon but I did not have shiro-ita konbu, at that time. Later I found a product where the shime-saba was covered with shaven kelp. Using this, I made sushi similar to “oshizushi” called “bo-zushi 棒鮨” without using a mold. We were quite satisfied with this version. Then, I found “shiro-ita konbu” listed on the website called “Japanese Taste”. This company sells authentic Japanese items including groceries. So, I bought the konbu to make a more authentic battera but again I did not use the mold.  (I was just a bit lazy. I would have had to find the mold and then soak it in water before I could use it). In the serving picture, you see the mackerel is covered with a thin layer of kelp. On the left most side I included sushi rice wrapped with “shiro-ika konbu”. They were good but I am not sure the konbu made a big difference in taste. I served this with cucumber and nappa cabbage asazuke 浅漬け and vinegar cured lotus root “su-renkon 酢レンコン.

Ingredients:

1 package of vinegar cured mackerel or shime-saba, thawed

One strip of “shiro-ita konbu 白板昆布 (#4)” about the same size as the mackerel

About 1/2 cup (or enough to make one roll of sushi) of sushi rice

Directions:

Season the kelp as per the package instructions (simmer in the mixture of dashi broth, soy sauce, sake and sugar, but the more standard seasoning uses sweet vinegar)

Remove the thin skin from the mackerel (#1)

Place the mackerel, skin side down on a silicon sushi mat (or plastic wrap on the top of a bamboo sushi mat), make a cylinder of sushi rice on the top and form a tight cylinder using the sushi mat (#2)

Place the seasoned kelp and form again (#3)

Wrap it in plastic wrap to let it settle for 5-20 minutes before slicing

A bit about “Shiro-ita konbu (#4)” and “oboro konbu おぼろ昆布 (#5)”.

“Shiro-ita  konbu” is the center part of kelp after the surface has been removed as “oboro-konbu” by shaving off the surface of the kelp making very thin strands. The package shown in #5 states this is hand-shaven showing the illustration of a guy shaving the kelp. This shaven kelp can be added to soup or udon noodles with broth. It does add some umami flavor but the texture is a bit “slimy”. So, I don’t know which is the main product and which is the byproduct “shiro-ikta conbu” or “oboro konbu” or vise versa.

From “Japanese Taste” I also got dried gourd peel or “kanpyo 干瓢” (which I have not been able to get for some time. The only kind available was pre-seasoned and could not be used as a tie for kelp roll). I also got “Hidaka Kelp 日高昆布”.  “Hidaka” is a place in Hokkaido famous for producing a good quality eating (as opposed to broth making) kelp.

Norwegian Mackerel Teriyaki 冷凍ノルウエイ鯖の照り焼き

We used to get fresh whole mackerel from Whole Foods or Hmart (via the Instacart) but we have not gotten whole mackerel for some time. At one time, I got frozen filets of Norwegian mackerel at our Japanese grocery store. I figured the time had come to use this. I was not sure if the filets were already salted (many frozen filets of mackerel appear salted), but there was no indication on the package. I thought about making salt grilled 塩焼きor miso simmered 味噌煮 but decided to make “teriyaki 照り焼き”. We served this with Shiitake mushroom risotto. A bit of a cultural mixture but both went well together. Since I took some care to reduce the fishiness, it had a good teriyaki taste (I did not use sugar in the sauce just mirin). The only problem (especially for my wife) is that these filets had quite a few small bones.

Ingredients:
2 frozen filets of Norwegian mackerel, thawed
2-3 tbs sake
Salt
AP flour
1 tbs vegetable oil

For teriyaki sauce
2 tbs mirin
2 tbs x4 concentrated Japanese noodle sauce

Directions:
After thawing, I wrapped the filets with sake soaked paper towels and let them sit in the refrigerator for 1 hour or so.
I then patted the filets dry with paper towels and salted them on both sides and let them sit at room temperature for 20 minutes and again patted dry the surface.
I cut a shallow oblique cut on the skin and then cut one filet into 4 portions.
I then dredged in flour.
I placed the filet portions skin side down in the frying pan with the vegetable oil on medium low flame.
I let it cook mostly from the skin side. After 5-6 minutes when the edges got opaque in the thick portions and top became opaque in the thin portions, I flipped it over to finish cooking (you can slightly under cook at this point since it is further cooked in the teriyaki sauce). Remove the fish and set aside. Wipe the oil from the pan clean.
Add the mirin and noodle sauce on medium high flame and let it reduce in half.
Add back the fish and coat all sides with the sauce until the liquid is almost evaporated.

I made the teriyaki sauce not too sweet. This was quite good especially for frozen mackerel and it was good to taste mackerel again after such a long time. But the bones were quite a botheration. When I filet the fresh mackerel myself, I remove most of the bones. I could have done this. Maybe next time.