1 tsp lemon juice
1 slice onion, ΒΌin/5mm thick
a few parsley stalks
4 heaped tbsp finely chopped fresh parsley
ΒΎ΄Η³ϊ/20²µ plain flour
1 bay leaf
salt and freshly milled black pepper
1 blade of mace
10 whole black peppercorns
1Β½΄Η³ϊ/40²µ butter
15fl oz/425ml milk
1 tbsp single cream