Add 2 tbsp olive oil to a pot, place over medium heat.
Add onions. Saute until they begin to soften. About 10 minutes.
Add the salt, black pepper, sumac, stir and cook for about ten minutes.
Add ¼ cup olive oil, stir with the onions and spices.
Add the spinach then the lemon juice, stir, cover and lower heat to low, cook for 15 minutes, stirring at intervals.
Remove the lid and allow the liquid to cook off, stirring occasionally.
Remove from heat once the spinach has lost its bright green color, let cool.
Preheat the oven to 400ºF (200ºC).
Roll out the dough balls into round shapes.
Place a spoonful of filling in the middle of the dough circle.
Bring dough edges together creating a triangle shape by piching the edges.
Pinch the edges from the point of the triangle in, leaving an opening in the middle of the turnover.
Place pies onto a baking tray lined with parchment paper.
Place in the oven for about 30 minutes or until golden brown.
Remove from the oven, and tray, and cool on a cooling rack.