To prepare the Fatayer dough

1. In a large bowl add the dry ingredients and then the wet ingredients.  Mix well with your hands or a pastry blender and let it sit until you make the spinach filling.
2. Pre-heat oven to 375ºF and line a large baking sheet with parchment paper

To prepare the Spinach filling

1. In a large nonstick skillet heat olive oil, add onion, and cook on medium heat for 5-7 minutes until translucent.  Add frozen spinach and cook until spinach has thawed and the water released has evaporated.  Add salt, sumac, garlic powder, black pepper, and lemon juice and cook for another 5 minutes stirring frequently. 
2. Add pine nut, mix well, remove from heat, and let it cool slightly.

How to assemble the Fatayer

1. Using 1/4 cup of dough at a time make dough balls.  Flatten the dough into a disk. To make it easier and faster you can use a tortilla press, check out the images above. Scoop 2 tablespoons of spinach filling and place the middle of the dough disk. Fold up edges to form a triangle pinching corners together and leaving an opening in the center.
2. Place the Fatayer on the prepared baking sheet. For best results chill the fatayer for 15 to 20 minutes before baking.
3. Bake for 25 minutes or until golden at the bottom.
4. Enjoy warm or at room temperature.