Cut the spinach into small pieces and sprinkle it with salt. Let it sit for about 15 minutes so the leaves release their water. Afterward, squeeze the spinach firmly with your hands to remove the excess liquid. Once drained, place the spinach in a large mixing bowl, ready for the filling.

Add all filling ingredients (onions, garlic, cheese, herbs, and spices).

Mix well until the ingredients combine evenly.

Set the mixture aside while you prepare the dough.

In a large mixing bowl, combine 2 cups of flour, yeast, sugar, salt, and water.

Knead until the ingredients come together smoothly.

Cover and let the dough ferment for 10 minutes.

After 10 minutes, add the remaining flour and olive oil.

Knead again until the dough feels smooth and elastic.

Lightly dust a clean surface with flour.

Roll the dough into a ball and spread it out evenly on the surface.

Cut the dough into portions, then fill each with a spoonful of spinach mixture.

Fold the dough into a triangle shape and press the edges firmly.

Place the pies on a baking tray lined with parchment paper.

Whisk an egg with milk to prepare the egg wash.

Brush the tops of the pies with the egg wash for a golden finish.

Bake in a preheated oven at 220°C for about 15 minutes, or until the pies turn golden brown.

Let the pies cool slightly before serving.