Stir in the flour and seasonings and cook for 2 minutes while stirring. Add the chicken broth a little at a while whisking until smooth. Whisk in the milk and bring to a boil. Simmer for 2-3 minutes or until thickened. Mix in the chicken (or turkey) and peas and flatten the filling to create and even surface.
*If you don't have an ovenproof skillet like a cast iron skillet, just cook filling in a normal skillet or pot and transfer to a pie dish before topping with the puff pastry.
One Skillet Chicken Pot Pie https://therecipecritic.com/one-skillet-chicken-pot-pie/