A piece of butter put in the freezer. Cheese, yolks and RUB on a small grater separately.

Sprats (without oil) and crush with a fork is the first layer. On sprats finely chopped onion, if the onion is very bitter – scald it with boiling water. Top with mayonnaise (not very much).

On a layer of protein, protein to grate frozen butter, then a layer of cheese, pour mayonnaise (layers do not need to crush, so it's best to use the mayonnaise dispenser). To fill egg yolk in the fridge for an hour. Despite the fact that the layers are not so many, lettuce is high lush. And delicious. Maybe it's me "sprat soul". Bon appetit!!!