Prepare the fish. In this case, I have 1 herring and 1 mackerel. Fish wash, peel, cut into fillets and cut into serving pieces. To cut the fish is better slightly frozen, so it does not crease and it comes off the bone. Peel the onion and cut it into half rings (or anything, who he loves)

Prepared fish put into the pan in which salt. I did in the container alternated layers of onion and fish.

Dissolve in 1 liter of water 5 tablespoons of salt. Pour the brine fish and not put a big load (that does not pop up), and leave for 2 hours.

After 2 hours, the brine is drained. Before you pour the vegetable oil our snack, it can be watered or sprinkled with lemon juice. So, pour vegetable oil (so it is stored better and will not be very salty) and enjoy all the meal. Well, very tasty, even the onion is eaten whole.