Feta Spinach pie - Greek style

Hi there!
So i have been in the kitchen yesterday and made my Feta-Spinach pie (Greek Style).
I must say that it came out quite good and it was not difficult to make at all.

Ingredients:
 1 table spoon Olive Oil
1 finely chopped Onion
10 cubes or 1/2 pack of frozen baby Spinach Leaves
250g Feta Cheese 
Black Pepper (to taste)

1 pack of basic phyllo dough (sfoliata)

1 egg
Some butter or baking spray (for non stick purposes) 

Method for Filling:

1. In a large pan add the Olive Oil and finely chopped Onion. Allow to cook until onion  is translucent. 

2. Add the 10 cubes or frozen baby Spinach Leaves to the pan with the onion and cover with lid for about 3-4min. (this will defrost the spinach)

3.Once Spinach is defrosted uncover and add some black pepper. Allow to cook for a couple of minutes so that any excess liquids from the spinach is cooked away. 

4. Now add the Feta Cheese to the pan with the spinach. Stir to become one with the spinach as the cheese melts. 

Method for Phyllo Dough: 

1. In a baking tray use some butter to cover the surface of the tray or spray some non stick baking spray.

2. Davide the phyllo in to two stacks (one for bottom and one for top)

3. Add the one stack to the bottom of the buttered baking tray covering sides of the tray as-well. Between layers of the phyllo dough add some beaten egg to help hold the phyllo together (does not have to be evenly distributed)

4. Pour the Feta & Spinach filling on top of the bottom layer and cover with the stack for top layer. Once more add some of the beaten egg between layers to hold and help stick the sided of the top layer with the bottom layer of dough.

5. Use the rest of the beaten egg to brush the surface of the top of the pie for a golden shiny look.

6. Bake in preheated oven for 30 minutes at 175°C.

7. Once you remove the pie from the oven. Cover for 10 minutes with some foil paper. This will soften the phyllo.