Clean the frozen mackerel, remove the bones and the black film, rinse thoroughly and dry.
Sprinkle with salt and rub each fillet.
Then sprinkle with sugar. Also rub each fillet.
Now brush with mustard.
Put the fillets in a bowl, cover with a lid and send them to the refrigerator for a day.
Here's what a fish looks like every other day.
Now rinse each mackerel fillet under running water and dry with paper towels.
Pierce the fillet from the tail side at a distance of 1-2 cm from the edge and thread the thread folded 2 times into the hole.
I hang the fish to dry for a day in the refrigerator.
After a day, cut the fish into portions and serve to the table.
And I wish you a pleasant appetite, good mood and all the best!