Mackerel if frozen previously thawed. Cut off the head, tail and fins, remove the entrails and wash well. Cut the fish along the ridge, remove the ridge and bones.
Salt the fillet and pepper, grease with lemon juice and leave for 15 minutes.
Grate the cheese on a fine grater, add garlic, passed through the press and very finely chopped onions, into it.
Peel and cut the potatoes into slices, boil in slightly salted water for 15-20 minutes.
Grease the form in which you cook with vegetable oil. Put one mackerel fillet in the middle and lay the cheese filling on it.
On the top of the filling, put the second half of the fish and squeeze a little, grease the sour cream on top.
Put the boiled potatoes around the fish, salt and pepper a little on top and bake at 180 degrees for 20 minutes. Then sprinkle with grated hard cheese and cook for another 10 minutes.
Mackerel with cheese is very tasty and fragrant, tender and juicy. Cooking such a fish is quite simple, the main thing in this dish is to remove the ridge and other bones so that later you can simply enjoy the taste of the most tender fillet with cheese and potatoes for a side dish. Such a fish will be to the taste of children and adults, it is perfect for a vegetable salad.