Chicken Pot Pie Casserole

Ingredients

• 2rotisserie chickens, shredded (about 1.4 kg / 6 cups shredded chicken)
• 1 largeonion, finely chopped
• 2celery sticks, finely chopped
• 2carrots, peeled and chopped
• 4garlic cloves, crushed
• 1 tspdried thyme
• 1 tspgarlic powder
• 300 g (2 cups)frozen peas
• 720 ml (3 cups)béchamel sauce or white sauce
• to tastesalt and black pepper
• 400 g (14 oz)frozen puff pastry, thawed
• 1egg, beaten

Instructions

1. 1

   Heat the oven

   Preheat the oven to 180°C (350°F).

2. 2

   Soften the vegetables

   Set a large frying pan or saucepan over medium-high heat and add a splash of olive oil. Add the onion, celery and carrots.

3. 3

   Season the vegetables

   Sauté for a few minutes, until the vegetables are soft and golden. Stir in the garlic and cook for a further minute, then season with the dried thyme, garlic powder, salt and black pepper.

4. 4

   Move to a bowl

   Transfer the cooked vegetables to a large mixing bowl.

5. 5

   Add the filling

   Add the shredded chicken, béchamel sauce and frozen peas to the bowl.

6. 6

   Check the seasoning

   Stir everything together, taste the filling and adjust the seasoning if needed.

7. 7

   Fill the dish

   Transfer the filling to a baking dish, about 22 × 33 cm (9 × 13 inches).

8. 8

   Roll the pastry

   On a floured surface, roll the puff pastry into a rectangle large enough to cover the dish.

9. 9

   Top and glaze

   Lay the pastry over the filling, crimp the edges and brush the top with beaten egg.

10. 10

    Bake until golden

    Bake in the preheated oven for 20–25 minutes, until the pastry is crisp and golden.

11. 11

    Rest before serving

    Take the dish out of the oven and leave it to rest for a few minutes before serving.

What is chicken pot pie casserole?

Chicken pot pie is an American comfort-food dish built around a savoury chicken filling and pastry. This casserole keeps the creamy filling in a baking dish and uses puff pastry for a simple, flaky top.

Rotisserie chicken makes the preparation quicker, while the onion, celery, carrots and peas give the sauce savoury depth and a mix of textures.

Nutrition and macros by portion

The nutrition label shows one serving as written: 563 calories, 34g protein, 34g carbs, 32g fat.

The pastry and béchamel contribute much of the fat and carbohydrate, while the chicken supplies most of the protein; the vegetables and peas add further carbohydrates and fibre. To balance the plate, serve a portion with a generous side of green vegetables or salad.

Why use rotisserie chicken?

Ready-cooked chicken saves the time needed to cook and cool chicken before assembling the filling. Shred it into bite-sized pieces so it is easy to serve and distributes evenly through the sauce.

Remove any bones and skin as you shred it, then fold the meat in with the vegetables, béchamel and peas.

Build flavour in the vegetables

Golden vegetables: Give the onion, celery and carrots a few minutes in the pan until soft and lightly browned. This softens them before they go into the oven.

Garlic and herbs: Add the crushed garlic after the vegetables have softened, and cook it for only a minute before adding the thyme and garlic powder.

Get the pastry ready

Thawed pastry: Let the pastry thaw enough to roll without cracking, but keep it cool and manageable. A light dusting of flour helps prevent sticking.

Full coverage: Roll it large enough to cover the dish, then crimp the edges around the rim. The beaten egg gives the top its golden finish as it bakes.

Look for these doneness cues

The recipe gives a 20–25 minute baking time. Check that the pastry has puffed and turned crisp and golden before taking the casserole out.

Leave it to rest for a few minutes before serving; this gives the filling a short chance to settle in the dish.

Serve it simply

The filling and pastry make this a substantial one-dish meal. A crisp green salad or simply steamed green vegetables are easy sides that bring freshness to the plate.

Serve with a large spoon so each portion includes some creamy filling and a piece of pastry.

Recipe notes & tips

• Thaw the puff pastry before rolling so it can cover the dish without cracking.
• Cut the carrots and celery into similar-sized pieces so they soften at a similar pace.
• Taste the filling before it goes into the dish and adjust the salt and pepper then.
• Use a baking dish around 22 × 33 cm to match the recipe's suggested size.
• Set the dish on a baking tray if you want to make it easier to handle when hot.

Variations

• Add mushrooms: Sauté sliced mushrooms with the onion, celery and carrots.
• Use mixed herbs: Swap the dried thyme for another dried herb blend you enjoy.
• Change the vegetables: Replace some of the peas with another frozen vegetable.
• Add a little mustard: Stir a small spoonful into the filling for a sharper savoury note.
• Make individual pies: Divide the filling between ovenproof dishes and top each with pastry.

Common mistakes to avoid

• Garlic added too early: It can brown while the other vegetables soften, so add it after they are tender.
• Pastry still frozen: It may crack when rolled; thaw it until flexible before using.
• Pastry too small: Roll it until it covers the whole dish, then crimp the edges.
• Skipping the seasoning check: Taste the filling before baking and adjust it while it is easy to stir.
• Cutting in immediately: Rest the casserole for a few minutes so the filling can settle.

How to store

Refrigerate leftover casserole in a covered container for up to 3 days. Reheat in the oven until hot throughout; the pastry is best reheated uncovered so it can crisp again.

Frequently asked questions