The most difficult is slice the onion rings. At first, you feel that bow much, but when you try it, you will think why so few. The fish is cleaned, washed, cut off the fins. Portions cut pieces. Fry in sunflower oil until tender, in slightly more than medium heat. Without the salt and flour!!! While chopping onions, I forgot to take a picture of the fish. But she's pale.

The fish put layers of onions in the container.

In a saucepan mix all the ingredients of marinade. Stirring bring to the boil and pour over the fish. When cooled in the fridge for 12 hours. Very tasty with any potatoes. I like just a garnish and onions and black bread.