Turkish Espanada outside is crispy on ,the inside is juicy/Figen Ararat

4.5 cups flour
1 teaspoon salt
1.5 glasses of water
1.5 tablespoons of vinegar
3 tablespoons of olive oil

filling
300 g mince
Grated 1 onion
1 teaspoon of salt
1 teaspoon of black pepper
A little more than 1/2 tea glass of water