Filled puff pastry squares: the rustic recipe for trying out immediately

Ingredients:
375 g of fresh puff pastry (or two rolls)
For the filling:
1 tablespoon of olive oil
1 onion
2 cloves of garlic
1 pinch of salt
1 pinch of pepper
150 g of fresh spinach
1/2 teaspoon of nutmeg
250 g of feta cheese
50 g cream cheese
1 egg
Cover up:
1 egg
2-3 tablespoons of Sesame grains
Ingredients:
375 g of fresh puff pastry (or two rolls)
For the filling:
1 tablespoon of olive oil
1 onion
2 cloves of garlic