Step 1

Preheat oven to 425º F.

Step 2

Drizzle the olive oil into a heavy Dutch oven or pot set over medium heat. Add the chicken and cook until browned. Using a slotted spoon, remove from the Dutch oven to a plate.

Step 3

Add the onions, potatoes and carrots and cook until the onions are translucent and the potatoes and carrots are slightly tender, about 8 minutes. Add the butter and allow to melt. Then, stir in the flour, salt and pepper and cook until thickened, about 2 more minutes. Pour in the chicken stock and bring to a boil. Add back in the chicken and their juices.

Step 4

Ladle the chicken pot pie filling into a 3-quart casserole dish or individual dishes set on a parchment or foil lined baking sheet. Top with puff pastry. Trim the edges of the puff pastry to about 1/2-inch overhang of the rim of the baking dish. Using a sharp knife, cut a slit in the puff pastry as a vent to allow steam to escape during baking. Bake until golden brown and the pot pie is bubbling, about 30 minutes.