So, I went home and while I was changing clothes and washing my hands, I left the pastry to unfreeze. I put it in a microwave which I rarely use to defrost faster. In a meantime, I chopped my spinach, I don't know how much I've put (put as much as you want), I added 2 eggs and the cottage cheese (add salt if needed).
Then, I sprinkled a little flour on my working table and put my puff pastry on. I cut it in 2 same sized pieces and set one piece a side. I stretched the first part with a rolling pin to fit my baking pan. I didn't make it in perfect circled shape, I just stretched it to cover the pan. I put the ready layer in the baking pan, added the filling and repeated the same procedure with the other half of my puff pastry (don't forget to sprinkle flour again and sprinkle some more on the top of the pastry to avoid sticking to the rolling pin). I put the second part on top, made some wrinkles and put the baking pan in preheated oven to bake at 220 Celsius degrees. It was ready in 20-25 minutes. I didn't add any oil to the baking pan since the puff pastry contains several layers of butter. It was one of the best pies I've ever made and I didn't put much effort in it.
Ingredients: