14 oz (400g) feta cheese ideally barrel aged Greek feta
5 ½ oz (150g) garlic and herb cream cheese
3 tbsp Parmesan cheese , grated
4 tbsp Greek yogurt or sour cream
For the Pastry
16 sheets phyllo pastry (allow for 20 in case you need them)
½ cup (115g) butter , melted or as needed (see notes)
¼ cup (60ml) club soda
2 tbsp sesame seeds , optional