Make the pie dough by combining butter with dry ingredients, then add water until the dough starts coming together. Chill in the fridge.
Preheat the oven to 400°F and butter a 9” pie dish.
Heat oil and butter in a nonstick pan over medium heat. Sauté onion until translucent, then add garlic and sauté for a minute.
Add flour and milk, stirring until thick and creamy.
Add spices and cook for a minute. Turn off the heat and add chicken, veggies, and cheese. Mix and set aside.
Roll out the pie dough, creating layers, and cover the pan. Prick with a fork and fill with the prepared filling.
Roll out the remaining dough and cover the pie, pinching the edges and creating a crimping pattern with a fork.
Generously brush with egg wash.
Bake for 30 minutes until golden and crispy. If it browns too much, cover with aluminum foil.
Serve hot and enjoy the delightful Chicken Pot Pie!