1 tsp lemon juice
1 slice onion, 录in/5mm thick
a few parsley stalks
4 heaped tbsp finely chopped fresh parsley
戮辞锄/20驳 plain flour
1 bay leaf
salt and freshly milled black pepper
1 blade of mace
10 whole black peppercorns
1陆辞锄/40驳 butter
15fl oz/425ml milk
1 tbsp single cream