Put the cream cheese, beaten egg yolk and sugar in a bowl and beat together with a fork. Add the raisins and nuts and stir them in. Put a large dollop of the mixture in a strip in the middle of each pancake, and fold it over as if you were wrapping a parcel.
Heat the butter in the frying pan, drop in the little parcels, brown them all over and serve hot, sprinkled with caster sugar. You