Begin to prepare the sauce by mixing eggs, olive oil, salt, and milk in a medium-size bowl and use another bowl to mix crumbled cheeses and chopped parsley.
Drizzle about 2 tbsp olive oil in a non-stick preferably 28cm diameter pan and place one yufka sheet hanging from the sides.
Now drizzle some of the prepared sauce over it and place the second yufka sheets over it, wrinkling the sheet and fit it to the pan evenly. The wrinkles will hold the sauce and create air pockets resulting in more springy borek.
Drizzle the sauce over the yufka plentifully. Notice that you will have to use half of the sauce for the bottom and half of it for the top layers approximately. Pour the cheese mixture over and spread it in even layer.
Place the third yufka sheet repeating as you did the second one and pour the sauce leaving some (about 3 tbsp) for the ones that are hanging from the sides. Now begin to fold the hanging part of the sheets on top of the filling creating a pocket.
Drizzle remaining sauce between the sheets, but not to the top of the borek. Doing so burns the sauce when cooking directly with the heat in the pan. We will brush the top only with oil.
Close the lid and cook in a medium heat about 10 minutes checking frequently. After you see a nice golden color on the bottom of the pan, brush the top of the borek with olive oil or butter.
To flip it easily, place a flat lid or plate that can fit inside the pan. After that, cook the other side of the borek until you have a golden color for about 10 minutes.
You can turn it over again to have a thicker, more crunchy crust or just slide it to your serving plate after resting in about 10-15 minutes.