01 -
Thinly slice onions and mince garlic cloves.
02 -
Heat olive oil in a skillet over medium heat and sauté onions until deeply caramelized, approximately 15 to 20 minutes.
03 -
Place the whole chicken into a slow cooker or oven-safe pot, season generously with salt and pepper, and drizzle Worcestershire sauce evenly over the bird.
04 -
Add the caramelized onions, thyme sprigs, minced garlic, and chicken stock atop the chicken.
05 -
Cook on low in the slow cooker for about 8 hours, or alternatively bake in a preheated oven at 300°F (150°C) for 4 to 5 hours until the chicken is tender and fully cooked.
06 -
Remove chicken and set aside. Strain the cooking liquid into a saucepan and bring to a simmer. Gradually stir in a cornstarch slurry until the sauce thickens to desired consistency.
07 -
Shred the chicken and serve warm with the prepared gravy.