Here is a very simple recipe to make Shime Saba/Cured Mackerel.
1. Go to Tokyo Fish Market, Albany to purchase Saba (Ask them to fillet for you, if you don't know how.) Alternatively, you can go to Nijiya Market, Marukai, Mitsuwa to purchase them.
2. As seen in the above picture, place Saba fillet on the bed of sea salt
3. Cover Saba with salt. 1 hour to 1.5 hour
4. Wash off the salt, soak in Vinegar for 7.5~10minutes
5. Flip Saba, soak another 7.5~10minutes