2 tbsp chopped carrots
2 tbsp chopped celery
2 tbsp chopped red onion
1 sprig fresh rosemary, leaves picked, chopped
1 x 400g/14oz good-quality chopped tomatoes
1 x 250g/9oz pack fresh lasagne sheets
125驳/4陆辞锄 00 flour
1 bay leaf
75g/3oz unsalted butter
110g/4oz unsalted butter
2 free-range eggs yolks
1 litre/1戮 pints full-fat milk
110ml/4fl oz full-fat milk
125驳/4陆辞锄 grated parmesan cheese
large handful grated parmesan
1 kg/2lb 2oz trimmed veal or beef flank, finely chopped
110g/4oz smoked pancetta
50g/2oz prosciutto, roughly chopped
125ml/4陆fl oz white wine