Step 1

Preheat oven to 200C.

Step 2

Toss chicken in flour with salt and pepper.

Step 3

Melt half the butter and sauté the leek and celery until soft. Place in bowl.

Step 4

Melt the rest of the butter and cook the chicken until browned.

Step 5

Add leek and celery mix to the chicken and return to heat.

Step 6

Add the cream, milk and parsley.

Step 7

Combine and simmer for 5 minutes. Check seasoning for taste.

Step 8

Put filling in a pie dish and cover with puff pastry.

Step 9

Beat egg and brush over the pastry.

Step 10

Bake for 20-25 minutes until pastry is golden.