In a bowl mix together the cooked spinach, ricotta, egg and seasoning. If you are using frozen, cooked spinach make sure you drain it really well, wring out a small amount at a time in your hands to remove as much the liquid. Set aside in the fridge.
Roll out thepuff pastry on a floured surface until ¼ - ½ inch thick.
With a pizza cutter or knife cut your pastry to 3inch x 4inch rectangles. You will need 2 for each pop tarts.
Spoon the filling onto a piece of the pastry. Take care not to overfill or the filling will come out.
Egg wash the edges of the pastry around the filling, lay on the top layer and seal the 2 pieces together with a fork. Egg wash the top of the Pop-Tart, this will give your Pop-Tart a lovely golden color. Prick the top with a fork to release steam while baking.
Bake at 400oF (200oC) for 20-23 minutes or until golden brown.
Enjoy warm from the oven.
You can freeze the pop tarts raw and then bake from frozen when needed.
Egg wash: whisk up an egg yolk with 4 tablespoons of milk and brush over pastry