1 tbsp butter
2 chicken breasts, cut into 1/2in slices
6 oz button mushrooms
1 1/4 cup chicken stock
2 celery stalks, sliced
1 heaped tbsp flour
2 tsp dijon mustard
1 tbsp creme fraiche
salt and pepper
puff pastry
1 egg
To make...
Preheat oven to 400F.
In a large saucepan heat olive oil and butter. Add chicken and cook for 3 minutes. Next add flour, sliced mushrooms and celery and stir to combine. Add mustard, creme fraiche and season with salt and pepper. Poor in chicken stock and stir everything together. Continue to simmer over medium heat till it begins to thicken.
Roll out puff pastry on a lightly floured surface making sure it is slightly bigger than the baking pan you are using.
Poor pie filling into baking pan then top with puff pastry folding in the edges (rustic looking). Brush the top of the pie with a beaten egg.
Bake pie in oven for about 15 minutes or until the pastry is puffed and golden.
Serve with some traditional British peas and carrots. :)