01 - Preheat your oven to 350°F (180°C).
02 - In a large ovenproof pot or Dutch oven, heat 1 tablespoon of olive oil or butter over medium heat. Add the chicken sausage pieces and sear for 3–4 minutes until browned. Remove the sausage from the pot and set aside.
03 - Add the remaining 1 tablespoon of olive oil or butter to the pot. Sauté the sliced onions, carrots, and celery for 5–6 minutes until they soften and begin to caramelize lightly.
04 - Arrange half of the potato slices over the sautéed vegetables. Season lightly with salt and pepper, then sprinkle with half of the dried thyme.
05 - Distribute half of the browned chicken sausage over the potatoes. Repeat the layering process with the remaining potatoes, thyme, and sausage.
06 - Pour in the chicken stock and hard apple cider (if using). Add the bay leaves. Bring the mixture to a gentle simmer on the stovetop.
07 - Cover the pot tightly and transfer it to the preheated oven. Bake for 1 hour, or until the potatoes are completely tender and the flavors have melded together.
08 - Carefully remove the bay leaves from the coddle. Sprinkle generously with fresh parsley before serving.