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Chicken Thyme Casserole

Chicken Thyme Casserole

By Borough BrothPublished on 16 February 2026This easy-to-make casserole is truly comforting midweek dining, combining succulent organic chicken with the earthy, fragrant notes of fresh thyme. The slow-cooked leeks and sprouts soak up the rich Borough Broth Organic Chicken Bone Broth, creating a sweet and slightly sticky sauce. It’s a simple, one-pan wonder that delivers deep, restaurant-quality flavour with very little effort.
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Time and servings

1 hr 10 minsTotal time
2Servings
10 minsPrep time
1 hrCooking time

Ingredients

  • ½ red onion, finely sliced
  • 1 leek, sliced into 1.5cm rounds
  • 1 celery stick, thinly sliced
  • 4 garlic cloves, crushed
  • 8 Brussels sprouts, halved
  • 6 thyme sprigs
  • 4 organic bone-in, skin-on chicken thighs
  • 324g Borough Broth Organic Chicken Bone Broth
  • ½ tbsp cornflour, optional
  • 300g pack potato or carrot and swede mash, to serve (optional)

Method

  • Step 1

    Heat the oven to 200°C/180°C fan/gas 6.

  • Step 2

    Place the red onion, leek, celery, garlic and Brussels sprouts into a shallow ovenproof dish. Top with 4 thyme sprigs.

  • Step 3

    Pat the chicken thighs dry with a paper towel, this helps the skin crisp. Add the chicken on top of the vegetables and season with black pepper. Strip the leaves from the remaining 2 thyme sprigs and scatter over.

  • Step 4

    Drizzle the rapeseed oil evenly over the chicken and vegetables. Bake in the oven for 15 mins or until the chicken skin begins to brown.

  • Step 5

    Meanwhile, empty the chicken bone broth into a pan and bring to a simmer on the hob. If you prefer a thicker sauce, mix the cornflour with a little water to create a smooth paste, then whisk this into the simmering broth.

  • Step 6

    Remove the dish from the oven and carefully pour the hot broth around the chicken, avoiding the skin to ensure it stays crispy.

  • Step 7

    Return to the oven and cook for a further 30–40 mins, checking that the chicken is cooked through and the vegetables are tender.

  • Step 8

    Remove from the oven and allow to rest briefly. Strip the chicken from the bone using forks, if you like, and serve with the vegetables, sauce and mash, if you like.