60 ml (4 tbsp) oil
1 medium onion, peeled and diced
450 g (1 lb) minced lamb
15 g (2 tbsp) fresh white breadcrumbs
salt and freshly ground pepper
7 g (1 tbsp) parsley, chopped
1 egg, beaten
2.5 ml (1/2 tsp) Worcestershire sauce
450 g (1 lb) fresh tagliolini verdi or fettucini
12.5 g (1/2 oz) butter, melted
nutmeg
2 egg yolks
300 ml (1/2 pt) sour cream
10 g (2 tsp) dried dill
juice of 1 lemon
dill or parsley, freshly chopped