16 asparagus spears
Β½ lemon, juice only
salt and freshly ground black pepper
100²µ/3Β½΄Η³ϊ flour
large pinch salt
50g/1ΒΎoz melted butter
250g/9oz unsalted butter, melted
2 free-range eggs
3 free-range egg yolks
250ml/9fl oz milk
8 Parma ham slices