Immediately apologize for no step by step photos, just wasn't going to put the recipe, and then... nothing. Herring cut into fillets and pour milk (for juicy and tender taste). While basking herring, cut onion into half rings and fry in 1 tbsp butter. Onion Browns, while we prepare the sauce: vegetable oil whisk mustard, salt, sugar and vinegar. Get the herring, seasoned with salt, pepper and dill. Turn to roll the skin out. In the form of onion (I'm the form is not smeared, but the recipe calls for 1 tbsp butter), it rolls from the fish, pour the sauce and sprinkle top with breadcrumbs. Bake 25 minutes at 250 t, while the surface fish are browned. Serve with boiled potatoes. All a pleasant appetite!