4 leeks, washed, trimmed, quartered lengthways and finely sliced
freshly ground black pepper
250g/9oz plain flour, plus extra for dusting
sea salt and freshly ground black pepper
1 tbsp olive oil
125g/4oz unsalted butter, cubed, at room temperature, plus extra for greasing
50驳/1戮辞锄 mature cheddar, grated
200ml/7fl oz double cream
1 free-range egg, separated
3 large free-range eggs
50驳/1戮辞锄 parmesan, finely grated
150g/5陆oz smoked bacon lardons