4 hr 30
Put an upturned heatproof saucer in the slow cooker. (Check that the chicken will be able to sit on top of the saucer with the cooker lid in place.) Preheat the covered cooker on HIGH.
Put the coriander and halved onion in the chicken’s cavity and season with pepper. Secure the opening with wooden cocktail sticks. Put the chicken in the cooker, breast-side down, then pour over the stock