Grate the boiled egg, potatoes and cheese on a small grater. Chop the dill.
Add a little salt (if desired), ground pepper, crushed garlic and season with mayonnaise.
Using a peeler, cut the cucumber into thin plates. Put a teaspoon on the edge of the cucumber strips filling. Put one fish on the filling.
It is desirable that sprats were small in size. If the fish are too large, you can trim them.
Carefully roll up the roll and fasten with a skewer. Garnish with herbs.