Set a wrapper down with a corner pointing toward you. Deposit roughly 1/4 cup of the mixture near the bottom, then fold that corner over the filling. Roll it up snugly, folding in the sides as you go, until the filling is fully contained. Brush the final corner with water and press it down to ensure a secure seal that keeps the contents inside. Set the finished rolls on the prepared sheet and cover with a damp cloth as you prepare the rest.