Roasting a chicken gives you an oven-to-table option but poaching a chicken opens up other possibilities. It also leaves you with a chicken stock you can use later.
To poach the chicken:
1 In a large pot, cover the chicken with cold water to within ²?³ of the pot's volume. The chicken must be covered in water. Add a peeled onion, a few peeled, diced carrots, 2 celery sticks, a bay leaf, 10 pepper corns, the zest of a lemon, parsley stalks, and a diced leek. If you don't have all these make sure you add the onion, carrot, celery and peppercorns.
2 Bring to the boil slowly and skim of any debris as it forms on the top.
3 Poach the chicken until all the flesh is cooked. Top up with water if you need to during the poaching to keep all the ingredients covered.