Use a small bowl and mix dried yeast with ½ cup warm water. Set it aside for 5 minutes so the yeast can get dissolved in water.
Use a large bowl and add flour and salt and make a hole at the center of the flour mixture and put 2 tbsp of olive oil. Add the yeast mixture and the rest of the remaining ½ warm water to the flour mixture.
Preheat the oven to 180 C/ 350 F
You can use your hand and knead for 3 -5 minutes until you get a soft, smooth dough or use a stand mixer.
Heat over medium heat olive oil in a large pan and add the onions and peppers and stir well for 3-5 minutes. When ready turn the heat off and the spinach, red pepper paste and stir. Then add feta cheese and stir again till mix well.
Add freshly ground black pepper and salt, stir and set aside.
When you see that the dough has doubled its size move it to a cutting board with a lightly floured surface and knead the dough for a minute.
Make two pieces from the dough and roll them into two balls. Then roll them on the cutting surface and into 2 oval shapes with 0.2” thickness.
You can use baking paper to cover the bottom of baking trays and then transfer the 2 oval flatbread dough.
Now use the mixture from the pan and fill the center of the flatbreads. Make sure you leave about 1''at the edges so the mixture does not spread outside the flatbread. You can squeeze the oval dough at each end.
Use a small bowl and mix 1 tbsp. olive oil with an egg. Beat it till you get a nice yellow liquid and brush the edges of the dough with it. Place it in the oven and bake for 20 minutes or til you start seeing the edges of the dough to change color to a golden brown.
Leave it for a few minutes and serve still warm.