Preheat your oven to 240C conventional (220C fan-forced).
Heat a wide oven safe sautee pan (approx. 30cm wide) over medium heat.
Add in the butter, bacon and leeks and sautee for about 2-3 minutes.
Add in the remaining vegetables and herbs with half the salt and black pepper and sautee for a further 5-6 minutes.
Add in the flour and toss together to coat the flour in the butter.
Follow that with the white wine and let that cook out for about a minute before adding in the stock, cream, crème fraiche and remaining salt and black pepper.
Bring to a simmer and taste for seasoning. Adjust as needed.
Fold in the shredded chicken and then turn the heat off.
Top the pie with overlapping squares of the pastry until you’ve covered almost the entire surface.
Brush with egg wash and bake for 25 minutes.
After 25 minutes reduce the heat to 180C conventional (160C fan-forced) for the remaining 20 minutes.
Allow this to sit at room temperature for at least 10-15 minutes before cutting into it to serve.
Garnish with chopped parsley, if using.
