Sheet Pan Chicken Pot Pie

Steps

1. Melt some butter and sauté the onion until softened.
2. Add flour to the melted butter and cook for about a minute to make a roux.
3. Whisk in chicken broth, ensuring all lumps are incorporated evenly.
4. Stir in garlic powder, pepper, and one cup of heavy cream.
5. Bring the mixture up to a simmer and let it cook for about 5 minutes or so until the sauce is thick and rich.
6. Add frozen mixed veggies and cooked chicken to the sauce.
7. Cook for about 2 more minutes just to warm everything through slightly.
8. Grease the sides of a sheet pan and roll out puff pastry to stretch it slightly to fit all the way to the edges.
9. Spread the puff pastry over the mixture on the sheet pan.
10. Bake in the oven at 400°F for about 25 minutes, or until cooked through and browned and bubbly.
11. Let the dish set for about 5 to 10 minutes before serving.