In a medium saucepan over medium heat, heat up your oil. Add in the garlic, onion and red pepper and sauté until the onions are soft. Sprinkle the greek seasoning over top.
Add in the spinach and stir just until it wilts. Take off the heat and mix in the feta cheese.
Let your filling cool to room temperature.
Preheat the oven to 425 degrees. Cover a pan with parchment paper.
Roll out your puff pastry. Cut into four strips the long way and then in half.
On the top row of rectangles put 3 tablespoons of filling on each one, keeping to the middle of the rectangle. Then place another bit of puff pastry over top. Do with both rolls of puff pastry.
Using a fork, go around and press down on the edges, sealing them together. Using a sharp knife, cut a few slits into the top of each pie for steam.
Place pies onto parchment paper and bake in preheat oven for 13-15 minutes or until golden brown.