To can fish, we need 2 half-liter glass jars with lids, an oven, a wire rack and a tray to collect the leaking liquid.
Thaw the fish in the refrigerator, remove the head, tail and entrails. Cut it into pieces 3 cm long across the ridge.
In thoroughly washed jars, place pepper and bay leaf on the bottom, and then fish up to the level of the jar hanger. There is no need to pour water - during the cooking process the fish will give juice and there will be enough liquid. Add ½ tbsp on top. salt and cover the jars with lids or foil.
Place the jars in the oven and simmer at a temperature of 120-140 ℃ for about 4 hours. Then heat the oil and pour 1 cup into each jar.
Close the jars tightly with lids and store canned food in a cool place.
Serve canned herring in oil at home with a side dish of potatoes.