1. Clean and wash the spinach. Sprinkle with salt and let it lay to remove as much water as possible.
2. Cut the onions, leaks and dill and set aside.
3. In a large pot cook the onion in the oil. When the onions are pale and translucent add the spinach and leaks to the pot and simmer stirring constantly until the spinach is wilted.
4. Add the dill. Add the rice. Season with salt and pepper and cook for a little longer.
5. Add the feta cheese and the eggs and mix well.
6. Arrange the puff pastry or phyllo pastry in an oiled baking pan and pour in the spinach mixture.
7. Cover with the remaining pastry sheets.
8. Butter a baking pan and pour in the mixture.
9. Bake in a moderate oven 180C [350 F] for about 30 minutes.