Sautee your onion in a pan with olive oil until translucent.
Add spinach and stir until wilted.
Add a really small pinch of salt and season with pepper and set aside to cool.
Mix spinach and onion with grated mozzarella, crumbled feta and parsley.
Dough and Form Pide
Bloom your yeast by adding it to your warm water and sugar and letting it sit for 10 minutes
Mix together your flour, walt , bloomed yeast and olive oil.
Knead for at least 6 minutes until dough comes together and place in an oiled bowl, cover with kitchen towel and let rise for 1 hour until doubled in size.
Punch dough down, and divide into 5, form into balls and cover with kitchen towel to let rise for 30 minutes.
Preheat the oven to 485 degrees.
Roll out each dough ball on a lightly floured surface nice and thin, you can make it thicker if you like. Fill, fold, brush edges with egg wash or olive oil and bake on a baking sheet for 12-13 minutes. If adding egg, add half way through bake time.