400g/14oz butternut squash, peeled, seeds removed
150g/5陆oz cooked spinach, squeezed of any moisture
black truffle shavings, to serve
45驳/1戮辞锄 plain flour, plus extra for dusting
sea salt and freshly ground black pepper
olive oil, for drizzling
45驳/1戮辞锄 unsalted butter, plus extra for greasing
250ml/9fl oz double cream
6 free-range egg whites
5 free-range egg yolks
250g/9oz fontina, grated
500ml/18fl oz hot full-fat milk
50驳/1戮辞锄 Parmesan, grated