Then pour the fried onion over the fish, add pepper and bay leaf.
There is a little trick in the preparation of lavrushka: set it on fire right on the stove to a slightly darkened color. I have an electric stove, and I put a sheet under the pan. So lavrushka acquires an incredibly fragrant smell, which will then be revealed during cooking, but it will not affect the taste of the dish in any way.