In a large bowl, sift the flour and salt.
Slowly add the water while kneading.
Turn onto a flour dusted surface and knead for about 10 minutes or until it becomes smooth.
Return to the bowl. Cover with a tea towel and let it rest for 15 minutes.
Filling
Option 1. Cheese and fresh spinach finely chopped
Option 2. Cheese
Option 3. Saute the onion in a frying pan with the extra virgin olive oil. Add the spinach and salt and pepper to taste and cook for a few minutes. Turn the heat off and keep aside to cool down.
Method
Divide dough into 4 balls. Roll each piece into a 20-25 cm circle.
Sprinkle crumbled feta over half the circle then top with some spinach and season. If using option 2&3 top the circle with corresponding filling.
Fold dough over to form a half circle and press edges with a fork.
Heat the frying pan on low-medium heat and add about 1 tablespoon oil. Carefully lift one of the gozleme and place it in the frying pan. Fry the gozleme on one side until golden brown, then flip it over and fry until also golden brown.