24 fresh lasagne sheets, cut into 12.5cm/4ΒΎin squares
250ml/9fl oz vegetable oil
100²µ/3Β½΄Η³ϊ walnuts, toasted and finely chopped
few dashes condimento morbido or white wine vinegar
4 egg yolks
20g/ΒΎoz grated Parmesan