Boil all the vegetables that include carrots, potatoes, peas and corns.
Make the filling by adding butter in a skillet, heat and add garlic. Cook for a while until it changes color and then add chopped onions.
Cook onions on a medium heat until they turn transparent in color.
Once the onions are soft and transparent, add boneless chicken and cook the for about 5 to 7 minutes or until the color of chicken is slightly white and brown.
Then add seasonings like salt and pepper. Also add herbs of your choice and mix well. Then add flour and cook the flour with chicken so that the raw flavor of flour is no more there.
Add liquids like milk and chicken broth to make a creamy sauce. Mix well and simmer for about 2 to 3 minutes, stirring constantly, until thickened.
Add the boiled vegetables, mix well and cook for a few minutes until combined.
Add cheese and cream to give this filling more cheesy and creamy texture that is full of flavor.
You can also use additional seasonings (I am using Peri Peri Seasoning) to make it more spicy and flavorful.
Let this cook for about 2 more minutes. Once cooked, keep this filling aside to let it cool a bit and start setting the puff pastry crust.
Roll out the thawed puff pastry to a desired size that will fit your pie dish, on a slightly floured surface. (I am using puff pastry on the base as well so I will need two layers)
Grease your pie pan with olive oil and place one layer of rolled-out puff pastry at the bottom.
Add the prepared filling on the top of puff pastry. Once the entire layer of puff pastry is covered with the filling, then place the second layer of rolled-out puff pastry to cover the filling.
Trim the extra puff pastry from the sides and make sure to seal the edges by crimping them together.
Make small slits on the top layer of puff pastry that will allow steam to escape during baking.
Make an egg-wash. Brush it the top of the puff pastry that will basically give the pot pie a glossy finish.
Preheat the oven at 400°F (200°C). Place your pie pan in a preheated oven and bake for 30 to 35 minutes or until the top layer is golden brown in color and the filling is bubbling.
Before serving, it is recommended to cool the pot pie slightly to help the filling set a bit, making it easier to serve.