Grate boiled egg, potatoes and cheese on a fine grater. Finely chop the dill.
Add a little salt (optional), ground pepper, crushed garlic and season with mayonnaise.
Using a vegetable peeler, cut the cucumber into thin slices. Put a teaspoon of the filling on cucumber strips. Put one fish on the filling.
It is desirable that the sprats are small in size. If the fish is too large, you can trim it.
Carefully roll up the roll and secure it with a skewer. Decorate with greenery.