3 leeks, washed and trimmed
1 unwaxed lemon, cut in half
1 orange pepper
2 red peppers
1 yellow pepper
4 sprigs rosemary
100g/3陆oz pitted dry-packed black olives
Sea salt flakes and freshly ground black pepper, to serve
4 tbsp olive oil
1 x 1.5kg/3lb 5oz chicken (preferably organic)