Preheat over to 180° celcius.
Thinly slice your carrot, celery, mushroom, cauliflower and leek (make sure you wash your leek!).
Dice your chicken breast into even pieces.
To a medium pan (that’s oven safe!) add your butter and olive oil then add your chicken.
Add your spices, so your white pepper, black pepper, paprika, cayenne, chilli powder and parsley, I try to add these onto the chicken so they don’t burn on the bottom of the pan.
Brown your chicken on the outside.
Add all your veggies; carrot, celery, mushroom, cauliflower and leek.
Mix this all together in the pan.
Add 1/2 cup chicken stock and 1/2 cup vegetable stock straight to the pan.
Once that’s all combined, you want to add a cornflour slurry. To do this add 1 tsp of cornflour to a small amount of water and combine. Then add the slurry straight to the pan and stir, this should thicken the mixture so you have more like a gravy texture.
Add your puff pastry directly on top of the mixture making sure you cover the entire top of the pie mixture.
Pop in the oven for about 15-20 minutes till the pastry is crispy on top.
Cut into equal pieces and enjoy!