Heat the oil in a flameproof casserole dish over a high heat. Add the chicken thighs and cook, skin-side down, for 3–4 minutes, or until the skin has turned a lovely golden colour. Turn the chicken thighs over, chuck in the garlic and cook for a further 30 seconds until fragrant. Pour in the stock and bring to the boil. Cover, reduce the heat to low and simmer gently for