Before initializing the procedure preheat the oven at 220 degree C.
Take a saucepan and add celery, chicken, carrots, peas, and chicken.
In the same pan add water and boil the ingredients for 15 minutes then drain the ingredients and discard the water.
Take another saucepan and add butter in it. Melt the butter and put onion in it. Fry them until it gets soft.
Then add flour, salt, pepper and celery seed in it and then add chicken and chicken broth. Mix the entire ingredients properly.
Now you will have to take a pie crust and pour the prepared mixture in it. Cover the pie and seal it properly.
On the top of the crust make several slits so that the steam can find a way out.
Bake the pie for 40 minutes and do not forget to check whether the crust is golden brown or not.