Heat the oil in a medium cast-iron pan (or oven-safe skillet) on medium heat.
Add the spring onions and fry for 3 mins, then stir through the frozen spinach and cook for 2 mins or until it’s warmed through.
Remove the skin from the chicken and discard. Shred the chicken o the bone and into the pan, and discard the bones.
Stir through the stock, mustard and Iya Foods Piri Piri Chicken Seasoning. Bring to a simmer and cook, uncovered, for 5-10 mins.
Stir in the peas, crème fraîche and parsley, then remove from the heat.
Scrunch the filo pastry sheets over the mixture, brush with a little oil and bake for 10-15 mins or until golden brown (checking periodically to ensure filo is not burning).