My family loves:

Spanakopita
(A Greek Spinach savoury slice)

INGREDIENTS
45 ml olive oil
1 large onion, chopped
1 bunch green onions, chopped
2 cloves garlic, minced
910 g spinach, rinsed and chopped
30 g chopped fresh parsley
2 eggs, lightly beaten
125 g ricotta cheese
250 g crumbled feta cheese
8 Filo pastry sheets
60 ml olive oil


DIRECTIONS
Preheat oven to 350 degrees F (175 degrees C). Lightly oil a square baking pan to fit the pastry shgeets.
Heat 3 tablespoons olive oil in a large skillet over medium heat. Saute onion, green onions and garlic, until soft and lightly browned. Stir in spinach and parsley, and continue to saute until spinach is limp, about 2 minutes. Remove from heat and set aside to cool.
In a medium bowl, mix together eggs, ricotta, and feta. Stir in spinach mixture. Lay 1 sheet of filo pastry in prepared baking pan, and brush lightly with olive oil. Lay another sheet of filo on top, brush with olive oil, and repeat process with two more sheets of filo. Spread spinach and cheese mixture into pan and fold overhanging pastry over filling. Brush with oil, then layer remaining 4 sheets of pastry, brushing each with oil. Tuck overhanging pastry into pan to seal filling.
Bake in preheated oven for 30 to 40 minutes, until golden brown. Cut into squares and serve while hot.


I haven't used this exact recipe... but it looks very close. It's easy as!