Combine the rosemary and thyme sprigs with the sage leaves. Using kitchen twine, tie them together to form an herb bundle.
Pot Pie Filling
Heat oil over medium heat in a stock pot and add onions, carrots, and celery (mirepoix).
Saute until onions become translucent.
Add minced garlic and saute for one additional minute.
Add flour and stir for an additional minute.
Add chicken base and water.
Bring to a boil and let the thickened mixture simmer for 3 minutes.
Add chicken, peas, and corn. Bring to a simmer, stirring it occasionally.
Add the milk and the herb bundle.
Allow the mixture to simmer for approximately 25-30 minutes.
Assembling the Pot Pie
Remove the mixture from the heat and remove the herb bundle.
Pour the mixture into a 9x13 baking dish.
Cover the top of the mixture with the Puff Pastry sheets.
Brush the top of the pasty with an egg wash.
Baking
Bake in the oven for 30-minutes or until the pastry crust has browned and is flaky.
Remove it from the oven and let it stand for 10 minutes before serving.
Enjoy!
Notes
Culinarian Tips, Tricks, and Suggestions:See our section on How-to's for a ready-made frozen mirepoix, which will speed up the preparation by having the onions, carrots, and celery ready to saute.