1 pack fresh basil (optional)
9 cherry tomatoes, quartered
1 onion, very thinly sliced
2 tbsp pesto
sea salt and freshly ground black pepper
flour, for dusting
1 free-range egg, beaten
1 x 125g pack of mini-mozzarella balls, drained and quartered
2 x 320g packs ready-rolled all-butter puff pastry
150ml/5fl oz soured cream
70驳/2陆辞锄 prosciutto, roughly chopped